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 10 and Turn 4, where the model never drops below 136 km/h (85 mph) and 111 km/h (69 mph) respectively, and Turn 4 requires no more than 21 m of braking in any class. The slow section is the opening sequence: Turn 1 dips to a 49 km/h (30 mph) simulated minimum through a 15.7 m effective radius, followed by the paired Turn 2 and Turn 3 at 58 and 51 km/h (36 and 32 mph), and Turn 5 is the tightest point on the circuit at a 13.1 m effective radius and a 45 km/h (28 mph) simulated minimum. The uphill Turn 6–8 stretch flows in the 78–101 km/h (48–63 mph) band before the long downhill Turn 11 drops 18 m to close the lap. Simulated lap times span 2:01.58 (liter bike) to 2:04.25 (middleweight twin). All figures are physics-simulation estimates.
All figures: physics-simulation estimates · generated 2026-07-08 · methodology & assumptions
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: 2:01.58 (liter bike), 2:02.00 (supersport 600), 2:04.25 (middleweight twin) — physics-simulation estimates
- Simulated average speeds: 117.6–120.2 km/h (73–75 mph) depending on bike class
- Slowest simulated point: Turn 5, 13.1 m effective radius, 45 km/h (28 mph) minimum
- Fastest simulated corner minimum: Turn 10, 136 km/h (85 mph) through a 121.7 m radius
- Biggest single elevation change in a corner: Turn 11, dropping 18 m over 309 m
Turn 1
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 122 km/h76 mph | 49 km/h30 mph | 143 km/h89 mph | 54 m177 ft | 16 m52 ft | -0.9 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
Turn 2
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 96 km/h60 mph | 58 km/h36 mph | 77 km/h48 mph | 108 m354 ft | 22 m72 ft | -0.9 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
A 54 m right-hander with a 21.8 m effective radius that sheds 1 m of elevation as it unwinds. The simulation carries 96 km/h (60 mph) to the braking point — about 108 m before entry for the supersport 600, 120 m for the liter bike, 84 m for the twin — then slows to a 58 km/h (36 mph) minimum. Exit is where the corner's short length shows: with just 54 m of arc to drive through, the model exits at 77 km/h (48 mph) across all three classes. Together with Turn 3 it forms one of the slower complexes of the lap. All numbers are physics-simulation estimates.
Turn 3
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 78 km/h48 mph | 51 km/h32 mph | 132 km/h82 mph | 165 m541 ft | 17 m56 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
The left-hand mirror of Turn 2 and, in the model's output, a step slower in minimum speed: 99 m long, a 17 m effective radius, and another 1 m of descent. Simulated minimums come in below Turn 2 — 78 km/h (48 mph) at brake application, a 51 km/h (32 mph) floor, and 132 km/h (82 mph) at exit for the two larger classes (125 km/h / 78 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 similarly slow arcs. Physics-simulation estimates throughout.
Turn 4
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 119 km/h74 mph | 111 km/h69 mph | 156 km/h97 mph | 21 m69 ft | 81 m265 ft | -1.1 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 5
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 130 km/h81 mph | 44 km/h28 mph | 137 km/h85 mph | 87 m285 ft | 13 m43 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
A 183 m right-hander at a 13.1 m effective radius, essentially flat with just 0.1 m of drop. After the speed of Turn 4, the simulation posts a substantial stop: the liter bike begins braking about 108 m out, the supersport 87 m, and the twin 63 m, all from roughly 130 km/h (81 mph). Minimum speed settles at 45 km/h (28 mph) — the lowest simulated speed anywhere on the lap. The simulated exit speed — 137 km/h (85 mph) for the two larger classes, 130 km/h (81 mph) for the twin — climbs back to the entry speed and beyond, marking this as a corner where the model is already building energy for the following straight rather than still shedding it. All figures are physics-simulation estimates.
Turn 6
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 107 km/h66 mph | 78 km/h48 mph | 111 km/h69 mph | 27 m89 ft | 41 m134 ft | +10.8 m+35 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
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 134 km/h83 mph | 101 km/h63 mph | 130 km/h81 mph | 21 m69 ft | 68 m222 ft | +5.6 m+18 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 8
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 109 km/h68 mph | 83 km/h51 mph | 120 km/h75 mph | 21 m69 ft | 46 m151 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
Turn 9
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 99 km/h62 mph | 57 km/h35 mph | 136 km/h85 mph | 54 m177 ft | 21 m70 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
Turn 10
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 158 km/h98 mph | 136 km/h84 mph | 151 km/h94 mph | 0 m0 ft | 122 m399 ft | -6.9 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
Turn 11
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 147 km/h91 mph | 85 km/h53 mph | 118 km/h74 mph | 21 m69 ft | 48 m157 ft | -18.2 m-60 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