Track guide · Preview · 3 of 12 corners open

Streets of Willow Springs

Rosamond, California · 2.51 km · 1.56 mi · clockwise

Streets of Willow Springs in Rosamond, California is a 2,510 m (1.56 mi) clockwise circuit with twelve numbered corners and a modest elevation band, running between 743.9 m and 766.7 m (2,441–2,515 ft). In the simulation's speed profile the lap splits into distinct fast and slow zones. The lap opens with its hardest stop — Turn 1 bottoms at 37 km/h (23 mph) from a 150 km/h (93 mph) approach — and corners 2 through 7 then form a mid-speed rhythm section: simulated minimums sit between 40 and 93 km/h (25–58 mph), with entries in the 74–124 km/h (46–77 mph) range. The fast part of the lap is the Turn 7–Turn 8 sequence, where the model exits Turn 7 at roughly 125 km/h (78 mph) and carries a 114 km/h (71 mph) minimum through the long-radius Turn 8. The slow section is the final pair, Turns 11 and 12, tight 11.7 and 6.7 m-radius corners where the simulation bottoms out at about 32 km/h (20 mph). Estimated lap times range from 91.3 s (liter bike) to 92.0 s (middleweight twin) — physics-simulation estimates, not measured data.

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

COMPUTED LINE · STREETS OF WILLOW SPRINGS SIM
Streets of Willow Springs track map with computed racing line
1.56 MI
Lap
12
Corners
131 FT
Climb

Track outline © OpenStreetMap contributors (ODbL)

Streets of Willow Springs — quick facts

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

  • Length: 2,510 m (1.56 mi), run clockwise
  • 12 numbered corners; tightest effective radius 6.7 m (Turn 12)
  • Elevation range: 743.9–766.7 m (2,441–2,515 ft), about 23 m (75 ft) of variation
  • Fastest simulated corner: Turn 8, 114.2 km/h (71 mph) minimum at an 85.9 m effective radius
  • Slowest simulated corner: Turn 12, bottoming at 31.9 km/h (20 mph)
  • Simulated lap times: 91.32 s (liter bike), 91.34 s (supersport 600), 92.04 s (middleweight twin) — physics-simulation estimates
  • Simulated average speed: 95.7–96.4 km/h (59–60 mph) depending on bike class

Turn 1

Right318 m arc
EntryMinExitBrake startEff. radiusElev Δ
150 km/h93 mph37 km/h23 mph135 km/h84 mph0 m0 ft9 m30 ft+7.1 m+23 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 8 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 2

Left84 m arc
EntryMinExitBrake startEff. radiusElev Δ
111 km/h69 mph71 km/h44 mph74 km/h46 mph30 m98 ft33 m110 ft-3.6 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 8 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 3

Left93 m arc
EntryMinExitBrake startEff. radiusElev Δ
74 km/h46 mph65 km/h40 mph106 km/h66 mph42 m138 ft28 m91 ft+5.1 m+17 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

Turn 3 is tighter than the corner before it: a 27.8 m-radius left, 93 m long, gaining 5.1 m of elevation. The simulated numbers are quite different, too — 74 km/h (46 mph) on entry, a 65 km/h (40 mph) minimum, and an exit of about 106 km/h (66 mph) on the supersport 600 and liter bike. Braking starts roughly 42 m out for all three classes; the middleweight twin exits at 106 km/h (66 mph). In the model this pair of lefts rides as two distinct problems, since the speeds the solver sees are very different.

Turn 4

Right90 m arc
EntryMinExitBrake startEff. radiusElev Δ
91 km/h56 mph60 km/h37 mph101 km/h63 mph30 m98 ft24 m79 ft+0.4 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 8 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 5

Left93 m arc
EntryMinExitBrake startEff. radiusElev Δ
101 km/h63 mph71 km/h44 mph108 km/h67 mph6 m20 ft34 m112 ft+2.4 m+8 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 8 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 6

Right87 m arc
EntryMinExitBrake startEff. radiusElev Δ
104 km/h65 mph92 km/h57 mph106 km/h66 mph27 m89 ft56 m185 ft+1.4 m+5 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 8 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 7

Right288 m arc
EntryMinExitBrake startEff. radiusElev Δ
124 km/h77 mph40 km/h25 mph125 km/h78 mph12 m39 ft11 m35 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

This corner's walkthrough is in the all-access pack — along with the other 8 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 8

Left72 m arc
EntryMinExitBrake startEff. radiusElev Δ
117 km/h72 mph114 km/h71 mph132 km/h82 mph33 m108 ft86 m282 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 8 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 9

Left96 m arc
EntryMinExitBrake startEff. radiusElev Δ
101 km/h63 mph72 km/h45 mph102 km/h63 mph39 m128 ft34 m111 ft-3.1 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

Turn 9 begins the increasingly slow, technical final quarter. It is a 96 m left at a 33.8 m effective radius, and it drops 3.1 m along the way. The simulation sheds speed here: braking starts about 39 m out, entry is 101 km/h (63 mph), and the minimum falls to 72 km/h (45 mph) — a floor the final corners will undercut. The exit climbs back to 102 km/h (63 mph), nearly identical across all three bike classes, because there is room to accelerate before the next corner arrives.

Turn 10

Right102 m arc
EntryMinExitBrake startEff. radiusElev Δ
112 km/h70 mph72 km/h45 mph78 km/h49 mph12 m39 ft34 m112 ft-1.9 m-6 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 8 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 11

Left48 m arc
EntryMinExitBrake startEff. radiusElev Δ
73 km/h46 mph42 km/h26 mph57 km/h36 mph15 m49 ft12 m38 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 8 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 12

Right123 m arc
EntryMinExitBrake startEff. radiusElev Δ
64 km/h40 mph32 km/h20 mph117 km/h73 mph60 m197 ft7 m22 ft-0.8 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 final corner is a 123 m right at a 6.7 m effective radius — among the tightest on the lap — descending 0.8 m toward the start-finish line. The simulation arrives at 64 km/h (40 mph), brakes for about 60 m, and holds a 32 km/h (20 mph) minimum before opening the throttle onto the front straight: 117 km/h (73 mph) at the exit for the supersport 600 and liter bike, 116 km/h (72 mph) for the twin. Because this is one of the slowest points of the lap in the model, this corner's significance is entirely in its exit, which sets speed for the run to Turn 1.