Track guide · Preview · 3 of 14 corners open

Streets of Willow Springs

Rosamond, California · 2.51 km · 1.56 mi · clockwise

Streets of Willow Springs in Rosamond, California is covered here as the clockwise full course with the Bowl: a 2,513 m (1.56 mi) lap with 14 numbered corners, from Turn 1 to the Turn 14 Skid Pad. The road is also run counter-clockwise; direction is the organizer's call. In the simulation the lap has three characters: a mid-speed uphill run through Turns 2–6, a fast northern loop where the reference line exits the Bowl at 164 km/h (102 mph) and passes 180 km/h (112 mph) at Turn 10, and a tightening finish where Turns 13 and 14 drop the minimum to 40 and 33 km/h (25 and 20 mph). Simulated lap times run 78.4 s (liter bike) to 80.2 s (middleweight twin). Every figure here is a physics-simulation estimate.

All figures: physics-simulation estimates · generated 2026-10-02 · methodology & assumptions

COMPUTED LINE · STREETS OF WILLOW SPRINGS SIM
Streets of Willow Springs track map with computed racing line
1.56 MI
Lap
14
Corners
131 FT
Climb

Track outline © OpenStreetMap contributors (ODbL)

Streets of Willow Springs — quick facts

Motorcycle track guide · simulation estimates · 2026-10-02

  • Layout: Streets of Willow — clockwise (full course with the Bowl), 2,513 m (1.56 mi), 14 corners
  • Simulated lap times: 78.4 s (liter bike), 78.8 s (supersport 600), 80.2 s (middleweight twin)
  • Simulated average speeds: 109–111 km/h (68–69 mph) depending on bike class
  • Slowest simulated point: Turn 14 Skid Pad, 7.1 m effective radius, 33 km/h (20 mph) minimum
  • Highest simulated speed in a corner: Turn 10, 183 km/h (114 mph) on the liter bike through a 230 m radius, no braking in any class
  • Biggest exit gain: Turn 8 the Bowl, from a 64 km/h (40 mph) minimum to 164 km/h (102 mph) at the exit
  • Biggest climb in a corner: Turn 1, gaining 5.9 m (19 ft) over 93 m
  • Longest simulated brake zones: 99 m into Turn 1 and Turn 9 for the liter bike; 78 m into Turn 9 for the supersport 600

Turn 1

Right93 m arc
EntryMinExitBrake startEff. radiusElev Δ
147 km/h91 mph126 km/h78 mph137 km/h85 mph75 m246 ft105 m344 ft+5.9 m+19 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 1 is a fast uphill right at the end of the front straight: 93 m on a 104.9 m effective radius, gaining 5.9 m (19 ft), the biggest climb of any corner on the course. The reference line arrives at 147 km/h (91 mph) and holds a 126 km/h (78 mph) minimum. The brake marks separate the classes clearly — 75 m before turn-in for the supersport 600, 99 m for the liter bike, and 45 m for the middleweight twin. The exit is 137 km/h (85 mph) on the two larger bikes and 136 km/h (85 mph) on the twin, still short of the entry speed because Turn 2 follows.

Turn 2

Right117 m arc
EntryMinExitBrake startEff. radiusElev Δ
90 km/h56 mph50 km/h31 mph119 km/h74 mph42 m138 ft17 m55 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

This corner's walkthrough is in the all-access pack — along with the other 10 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 3

Left138 m arc
EntryMinExitBrake startEff. radiusElev Δ
89 km/h55 mph67 km/h42 mph118 km/h74 mph57 m187 ft30 m98 ft+2.6 m+9 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 10 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 4

Right87 m arc
EntryMinExitBrake startEff. radiusElev Δ
102 km/h63 mph65 km/h41 mph104 km/h64 mph27 m89 ft28 m93 ft+1.2 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 10 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 5

Left78 m arc
EntryMinExitBrake startEff. radiusElev Δ
103 km/h64 mph80 km/h50 mph99 km/h61 mph3 m10 ft42 m139 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 10 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 6

Right96 m arc
EntryMinExitBrake startEff. radiusElev Δ
114 km/h71 mph106 km/h66 mph132 km/h82 mph60 m197 ft74 m242 ft+1.2 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

Turn 6 closes the uphill sequence with a faster right: 96 m on a 73.9 m effective radius, gaining 1.2 m. The supersport 600 arrives at 114 km/h (71 mph), the liter bike at 115 km/h (71 mph), the twin at 111 km/h (69 mph), and all three begin braking 60 m out — the longest brake zone on the lap for the twin. The minimum is 106 km/h (66 mph), the highest of the first six corners. The reference line drives out at 132 km/h (82 mph) on the two larger bikes and 130 km/h (81 mph) on the twin, setting up the fast northern loop that begins at Turn 7.

Turn 7

Left147 m arc
EntryMinExitBrake startEff. radiusElev Δ
136 km/h85 mph118 km/h74 mph136 km/h85 mph9 m30 ft92 m303 ft+1.8 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 10 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 8 — The Bowl

Right222 m arc
EntryMinExitBrake startEff. radiusElev Δ
89 km/h55 mph64 km/h40 mph164 km/h102 mph36 m118 ft27 m89 ft-4.1 m-13 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 10 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 9

Right12 m arc
EntryMinExitBrake startEff. radiusElev Δ
163 km/h101 mph162 km/h101 mph164 km/h102 mph78 m256 ft174 m570 ft-0.1 m-0 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 is a 12 m right-hand kink on a 173.7 m effective radius, essentially flat, taken at the top of the run out of the Bowl. The speed trace barely moves: entry is 163 km/h (101 mph), the minimum 162 km/h (101 mph), and the exit 164 km/h (102 mph) in every class. The simulation logs a brake marker ahead of the kink — 78 m for the supersport 600, 99 m for the liter bike, 48 m for the twin, the longest zones on the lap for the four-cylinders — but loses almost nothing through the corner itself. Turn 10, a few meters on, is where the lap's peak speed is reached.

Turn 10

Left6 m arc
EntryMinExitBrake startEff. radiusElev Δ
179 km/h111 mph179 km/h111 mph180 km/h112 mph0 m0 ft230 m755 ft-0.1 m-0 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 10 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 11

Left78 m arc
EntryMinExitBrake startEff. radiusElev Δ
93 km/h58 mph68 km/h42 mph109 km/h68 mph42 m138 ft30 m98 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 10 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 12

Right75 m arc
EntryMinExitBrake startEff. radiusElev Δ
119 km/h74 mph80 km/h50 mph78 km/h49 mph6 m20 ft45 m149 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

This corner's walkthrough is in the all-access pack — along with the other 10 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 13

Left69 m arc
EntryMinExitBrake startEff. radiusElev Δ
78 km/h49 mph40 km/h25 mph69 km/h43 mph9 m30 ft10 m34 ft-0.3 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 10 locked corners on this track.

Unlock every corner · $59 lifetime →

Turn 14 — Skid Pad

Right93 m arc
EntryMinExitBrake startEff. radiusElev Δ
69 km/h43 mph33 km/h20 mph129 km/h80 mph3 m10 ft7 m23 ft-0.7 m-2 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 10 locked corners on this track.

Unlock every corner · $59 lifetime →