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
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
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 84 km/h52 mph | 37 km/h23 mph | 90 km/h56 mph | 129 m423 ft | 10 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
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 106 km/h66 mph | 47 km/h29 mph | 119 km/h74 mph | 102 m335 ft | 15 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
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 106 km/h66 mph | 47 km/h29 mph | 119 km/h74 mph | 102 m335 ft | 15 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
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 142 km/h88 mph | 119 km/h74 mph | 158 km/h98 mph | 0 m0 ft | 93 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
Turn 5
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 117 km/h73 mph | 61 km/h38 mph | 110 km/h69 mph | 102 m335 ft | 25 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
Turn 6
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 122 km/h76 mph | 84 km/h52 mph | 126 km/h78 mph | 18 m59 ft | 48 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
Turn 7
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 131 km/h81 mph | 98 km/h61 mph | 130 km/h81 mph | 54 m177 ft | 64 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
Turn 8
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 131 km/h81 mph | 98 km/h61 mph | 130 km/h81 mph | 54 m177 ft | 64 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
Turn 9
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 113 km/h70 mph | 64 km/h40 mph | 118 km/h74 mph | 48 m157 ft | 27 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
Turn 10
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 150 km/h93 mph | 125 km/h78 mph | 152 km/h95 mph | 18 m59 ft | 103 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
Turn 11
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 143 km/h89 mph | 99 km/h61 mph | 141 km/h88 mph | 51 m167 ft | 65 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