Track guide · Preview · 3 of 11 corners open

Sonoma Raceway

Sonoma, California · 4.12 km · 2.56 mi · clockwise

Sonoma Raceway is a 4,125 m (2.56 mi) clockwise circuit in Sonoma, California, with 11 numbered corners and pronounced vertical relief: the surface spans 4.9 m to 53.7 m of elevation, a 48.8 m (160 ft) spread, and accumulates 77.9 m of climbing per lap. The simulated speed profile splits the lap cleanly. The fast sections are Turn 4 and Turn 10, where the model never drops below 119 km/h (74 mph) and 125 km/h (78 mph) respectively, and Turn 4 requires no braking at all for the supersport class. The slow section is the opening sequence: Turn 1 is the tightest point on the circuit at a 9.5 m effective radius and a 37 km/h (23 mph) simulated minimum, followed by the paired Turn 2 and Turn 3 at 47 km/h (29 mph). The uphill Turn 6–8 stretch flows in the 84–98 km/h (52–61 mph) band before the long downhill Turn 11 drops 16 m to close the lap. Simulated lap times span 1:57.87 (liter bike) to 2:01.21 (middleweight twin). All figures are physics-simulation estimates.

All figures: physics-simulation estimates · generated 2026-07-08 · methodology & assumptions

COMPUTED LINE · SONOMA RACEWAY SIM
Sonoma Raceway track map with computed racing line
2.56 MI
Lap
11
Corners
256 FT
Climb

Track outline © OpenStreetMap contributors (ODbL)

Sonoma Raceway — quick facts

Motorcycle track guide · simulation estimates · 2026-07-08

  • Length: 4,125 m (2.56 mi), run clockwise — 11 corners
  • Elevation: 4.9 m to 53.7 m, a 48.8 m (160 ft) spread; 77.9 m of climbing per lap
  • Simulated lap times: 1:57.87 (liter bike), 1:58.64 (supersport 600), 2:01.21 (middleweight twin) — physics-simulation estimates
  • Simulated average speeds: 122.9–126.4 km/h (76–79 mph) depending on bike class
  • Slowest simulated point: Turn 1, 9.5 m effective radius, 37 km/h (23 mph) minimum
  • Fastest simulated corner minimum: Turn 10, 125 km/h (78 mph) through a 103.4 m radius
  • Biggest single elevation change in a corner: Turn 11, dropping 16 m over 318 m

Turn 1

Right54 m arc
EntryMinExitBrake startEff. radiusElev Δ
84 km/h52 mph37 km/h23 mph90 km/h56 mph129 m423 ft10 m31 ft+1.3 m+4 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 tightest corner on the circuit: a 54 m right-hander with a 9.5 m effective radius, climbing a modest 1.3 m through its arc. In the simulation the supersport 600 begins braking about 129 m before turn-in, arrives at 84 km/h (52 mph), and bottoms out at 37 km/h (23 mph) — the lowest simulated speed anywhere on the lap — before accelerating out at 90 km/h (56 mph). Brake-zone length is where the classes diverge most: the model has the liter bike starting its stop roughly 159 m out, while the lighter, slower middleweight twin needs only about 99 m. All three classes share essentially identical entry, minimum, and exit speeds here. These figures are physics-simulation estimates.

Turn 2

Right156 m arc
EntryMinExitBrake startEff. radiusElev Δ
106 km/h66 mph47 km/h29 mph119 km/h74 mph102 m335 ft15 m48 ft-2.1 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

A 156 m right-hander with a 14.6 m effective radius that sheds 2.1 m of elevation as it unwinds. The simulation carries 106 km/h (66 mph) to the braking point — about 102 m before entry for the supersport 600, 114 m for the liter bike, 81 m for the twin — then slows to a 47 km/h (29 mph) minimum. Exit is where the corner's length pays off: with 156 m of arc to drive through, the model exits at 119 km/h (74 mph) on the 600 and liter bike, and 116 km/h (72 mph) on the twin. Together with Turn 3 it forms the second-slowest complex of the lap after Turn 1. All numbers are physics-simulation estimates.

Turn 3

Left156 m arc
EntryMinExitBrake startEff. radiusElev Δ
106 km/h66 mph47 km/h29 mph119 km/h74 mph102 m335 ft15 m48 ft-2.1 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 left-hand mirror of Turn 2 and, in the model's output, its statistical twin: 156 m long, a 14.6 m effective radius, and another 2.1 m of descent. Simulated speeds match Turn 2 exactly — 106 km/h (66 mph) at brake application, a 47 km/h (29 mph) floor, and 119 km/h (74 mph) at exit for the two larger classes (116 km/h / 72 mph for the middleweight twin). What changes is the direction: this is the first left-hander of the clockwise lap, so the transition from the preceding right demands a full side-to-side change of lean between two identically slow arcs. Physics-simulation estimates throughout.

Turn 4

Right153 m arc
EntryMinExitBrake startEff. radiusElev Δ
142 km/h88 mph119 km/h74 mph158 km/h98 mph0 m0 ft93 m305 ft-1.3 m-4 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

This corner's walkthrough is in the all-access pack — along with the other 7 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 5

Right138 m arc
EntryMinExitBrake startEff. radiusElev Δ
117 km/h73 mph61 km/h38 mph110 km/h69 mph102 m335 ft25 m81 ft-0.2 m-1 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

This corner's walkthrough is in the all-access pack — along with the other 7 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 6

Right132 m arc
EntryMinExitBrake startEff. radiusElev Δ
122 km/h76 mph84 km/h52 mph126 km/h78 mph18 m59 ft48 m158 ft+11.6 m+38 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

This corner's walkthrough is in the all-access pack — along with the other 7 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 7

Left210 m arc
EntryMinExitBrake startEff. radiusElev Δ
131 km/h81 mph98 km/h61 mph130 km/h81 mph54 m177 ft64 m211 ft+11.0 m+36 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

This corner's walkthrough is in the all-access pack — along with the other 7 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 8

Right210 m arc
EntryMinExitBrake startEff. radiusElev Δ
131 km/h81 mph98 km/h61 mph130 km/h81 mph54 m177 ft64 m211 ft+11.0 m+36 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

This corner's walkthrough is in the all-access pack — along with the other 7 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 9

Right114 m arc
EntryMinExitBrake startEff. radiusElev Δ
113 km/h70 mph64 km/h40 mph118 km/h74 mph48 m157 ft27 m88 ft-11.4 m-37 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

This corner's walkthrough is in the all-access pack — along with the other 7 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 10

Right138 m arc
EntryMinExitBrake startEff. radiusElev Δ
150 km/h93 mph125 km/h78 mph152 km/h95 mph18 m59 ft103 m339 ft-3.8 m-12 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

This corner's walkthrough is in the all-access pack — along with the other 7 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 11

Left318 m arc
EntryMinExitBrake startEff. radiusElev Δ
143 km/h89 mph99 km/h61 mph141 km/h88 mph51 m167 ft65 m212 ft-16.0 m-52 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

This corner's walkthrough is in the all-access pack — along with the other 7 locked corners on this track.

Unlock every corner · $59 lifetime →