Willows, California · 7.35 km · 4.57 mi · counterclockwise
Thunderhill Raceway Park's Full Course in Willows, California links 29 numbered corners over 7,339 m (4.56 mi) run counterclockwise. Elevation in the source data spans 83 m to 123.3 m — roughly a 40 m (132 ft) working range — with 96.3 m of cumulative gain per lap. The simulated speed profile splits the lap cleanly: the fast stretch runs from Turn 8, where the model's minimum never drops below 114 km/h (71 mph), through the quick Turn 9 and Turn 27 arcs at 137 km/h (85 mph) and 95 km/h (59 mph) minimums. The slow business sits in the Turn 5–6 complex (67 km/h / 41 mph minimum), the climbing Turn 10–11 pairing, and above all the Turn 17–19 cluster, where simulated minimums fall to about 33 km/h (20 mph) — the slowest points on the circuit. Simulated lap times range from 3:35.9 on a liter bike to 3:40.2 on a middleweight twin. All figures on this page are physics-simulation estimates.
Simulated average lap speed: 118.4–120.8 km/h (74–75 mph) depending on bike class
Location: Willows, California
Turn 1
Left180 m arc
Entry
Min
Exit
Brake start
Eff. radius
Elev Δ
159 km/h99 mph
122 km/h76 mph
161 km/h100 mph
18 m59 ft
99 m324 ft
+2.0 m+7 ft
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The right-hand half of the 5–6 complex is the bigger element in the source data: 48 m effective radius, 174 m of length, 11.4 m of descent, and a simulated speed trace that never dips below its 77.6 km/h (48 mph) entry, recovering to about 110 km/h (69 mph). The matching boundary speeds — Turn 5 exits at exactly the 77.6 km/h this corner carries at entry — reflect how the physics model treats the pairing as one continuous slow section with a direction change in the middle; no straight between them is long enough to reset the speed profile. The brake-start figure of 69 m (66 m for the twin) sits well up the approach: deceleration is completed before the corner rather than blended into it. Simulation estimates with stated assumptions.
Turn 7
Left186 m arc
Entry
Min
Exit
Brake start
Eff. radius
Elev Δ
125 km/h78 mph
92 km/h57 mph
133 km/h83 mph
12 m39 ft
56 m184 ft
+1.0 m+3 ft
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
A short left: 81 m at 88.5 m effective radius, gaining 0.8 m. The simulation brakes hard here — 69 m for the supersport 600, 84 m for the liter bike — from a 144.1 km/h (90 mph) approach, settling to a 115.9 km/h (72 mph) minimum. The exit figure of 124.5 km/h (77 mph) is notably restrained, roughly 20 km/h below entry, because the corner flows straight into Turn 21's right-hand arc. Interestingly, all three classes exit within 1.5 km/h of each other in the model; the following corner, not engine output, is the binding constraint. Simulation estimates.
Turn 21
Right171 m arc
Entry
Min
Exit
Brake start
Eff. radius
Elev Δ
110 km/h68 mph
76 km/h48 mph
98 km/h61 mph
21 m69 ft
39 m127 ft
+2.9 m+10 ft
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library. The full walkthrough for this corner — braking references, the shape of the entry, what the elevation does to the bike mid-corner, and how the three bike classes differ on the way out — is part of the all-access guide. The complete corner-by-corner text unlocks with the pack, together with the printable guide and the CSV corner tables for every circuit in the library.
This corner's walkthrough is in the all-access pack —
along with the other 25 locked corners on this track.
Supersport 600 preset · simulation estimates · liter-bike and 650-twin figures for every corner ship in the all-access pack · how these are computed
The final corner opens up from Turn 28 in the source data — 149.1 m effective radius, 15 m length, no net elevation change, a 131.9 km/h (82 mph) minimum, and a 141 km/h (88 mph) exit — with a brake-start figure of 72 m for every class, treated by the model as a fast final kink onto the front straight. From this exit the simulation completes the 7,339 m lap in 216.5 seconds (3:36.5) on a supersport 600, 215.9 seconds (3:35.9) on a liter bike, and 220.2 seconds (3:40.2) on a middleweight twin, averaging 118.4–120.8 km/h (74–75 mph). All lap and corner figures are physics-simulation estimates.
