Sonoma Raceway
Sonoma, California · 3.81 km · 2.37 mi · clockwise
Sonoma Raceway, California, is covered here as the Motorcycle Course: a 3,810 m (2.37 mi) clockwise lap with 14 cards on the turn sheet, ending in the Turn 12 kink onto the front straight. The layout climbs hard at the start — Turn 1 alone gains 16.9 m (55 ft) — and gives it back through Turn 4 and the Carousel. The simulated profile has fast zones at Turns 1, 5 and 10, where the reference line never drops below 135 km/h (84 mph), and two slow ones, the Turn 7 hairpin at 62 km/h (39 mph) and the Turn 11A hairpin at 39 km/h (24 mph). Simulated lap times run 1:42.65 (liter bike) to 1:45.23 (middleweight twin). Every figure on this page is a physics-simulation estimate.
All figures: physics-simulation estimates · generated 2026-10-02 · methodology & assumptions
Track outline © OpenStreetMap contributors (ODbL)
Sonoma Raceway — quick facts
Motorcycle track guide · simulation estimates · 2026-10-02
- Layout: Motorcycle Course — 3,810 m (2.37 mi), run clockwise, 14 turn cards
- Simulated lap times: 1:42.65 (liter bike), 1:43.21 (supersport 600), 1:45.23 (middleweight twin)
- Simulated average speeds: 127.7–130.9 km/h (79–81 mph) depending on bike class
- Slowest simulated point: Turn 11A hairpin, 10.1 m effective radius, 39 km/h (24 mph) minimum
- Fastest simulated corner minimum: Turn 1, 145 km/h (90 mph) through a 138.9 m radius, with Turn 5 a fraction behind at 144 km/h (90 mph)
- Biggest climb in a corner: Turn 1, gaining 16.9 m (55 ft) over 252 m
- Biggest drop in a corner: Turn 6 Carousel, falling 14.6 m (48 ft) over 309 m
- Longest simulated brake zone: 135 m for the liter bike into the Turn 7 hairpin
Turn 1
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 175 km/h109 mph | 145 km/h90 mph | 152 km/h94 mph | 51 m167 ft | 139 m456 ft | +16.9 m+55 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 2
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 113 km/h70 mph | 84 km/h52 mph | 145 km/h90 mph | 39 m128 ft | 47 m155 ft | +10.2 m+33 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
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 130 km/h81 mph | 108 km/h67 mph | 120 km/h74 mph | 51 m167 ft | 78 m257 ft | +4.6 m+15 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 3A
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 113 km/h70 mph | 99 km/h61 mph | 138 km/h86 mph | 15 m49 ft | 65 m213 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
Turn 4
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 98 km/h61 mph | 68 km/h42 mph | 126 km/h78 mph | 57 m187 ft | 30 m99 ft | -10.9 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
Turn 5
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 151 km/h94 mph | 144 km/h90 mph | 171 km/h106 mph | 6 m20 ft | 137 m449 ft | -4.2 m-14 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 — Carousel
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 124 km/h77 mph | 99 km/h62 mph | 162 km/h100 mph | 69 m226 ft | 65 m213 ft | -14.6 m-48 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 7 — Hairpin
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 113 km/h70 mph | 62 km/h39 mph | 106 km/h66 mph | 111 m364 ft | 26 m84 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
The Turn 7 hairpin is where the simulation posts its longest brake zone. A 231 m right on a 25.7 m effective radius, rising 3.6 m (12 ft), it is approached at 113 km/h (70 mph) with the brakes on from 111 m out on the supersport 600, 135 m on the liter bike, and 81 m on the twin. Minimum speed drops to 62 km/h (39 mph), the third-slowest point on the lap. The exit is 106 km/h (66 mph) for the two larger bikes and 105 km/h (65 mph) for the twin — below the entry speed, because the reference line is still turning when the esses arrive.
Turn 8 — Esses
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 116 km/h72 mph | 113 km/h70 mph | 154 km/h96 mph | 3 m10 ft | 84 m276 ft | -2.8 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
Turn 8A
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 139 km/h86 mph | 119 km/h74 mph | 134 km/h83 mph | 36 m118 ft | 94 m308 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
Turn 9A — Chicane
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 116 km/h72 mph | 55 km/h34 mph | 113 km/h70 mph | 96 m315 ft | 20 m65 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 chicane is the Motorcycle Course's bike-specific right at the end of the esses: 141 m on a 19.8 m effective radius, falling 2 m (7 ft). The reference line approaches at 116 km/h (72 mph) and brakes from 96 m out on the supersport 600, 111 m on the liter bike, and 75 m on the twin, the second-longest zone of the lap. Minimum speed is 55 km/h (34 mph), the second-slowest point on the circuit. The exit is 113 km/h (70 mph) for the two larger classes and 111 km/h (69 mph) for the twin, effectively back to the entry speed as the line straightens toward Turn 10.
Turn 10
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 145 km/h90 mph | 135 km/h84 mph | 166 km/h103 mph | 0 m0 ft | 120 m393 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 11A — Hairpin
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 77 km/h48 mph | 39 km/h24 mph | 106 km/h66 mph | 87 m285 ft | 10 m33 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
The Turn 11A hairpin is the slowest point on the lap and its tightest radius: 78 m of arc on a 10.1 m effective radius, flat at +0.2 m. The reference line arrives at just 77 km/h (48 mph) because the braking starts well back — 87 m before turn-in for the supersport 600, 90 m for the liter bike, 81 m for the twin — and bottoms at 39 km/h (24 mph). The exit builds to 106 km/h (66 mph) on the two larger classes and 104 km/h (65 mph) on the twin, launching the run through Turn 12 onto the front straight.
Turn 12
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 102 km/h63 mph | 102 km/h63 mph | 106 km/h66 mph | 0 m0 ft | 241 m792 ft | +0.0 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