Harris Hill Raceway
San Marcos, Texas · 2.92 km · 1.82 mi · clockwise
Harris Hill Raceway in San Marcos, Texas is modeled here in its Clockwise layout: 2,922 m (1.82 mi) of centerline through eleven numbered corners — four lefts and seven rights — climbing a total of 26 m (85 ft) per lap. Every speed, distance and lap time on this page is a physics-simulation estimate from track geometry, not measured data. The profile is fast at both ends: Turn 1 is entered at 182 km/h (113 mph), Turn 6 at 180 km/h (112 mph), and Turn 11 exits at 176 km/h (110 mph). The slow points are Turn 10, a 37.4 m-radius right at 75 km/h (47 mph), and Santa Rita (Turn 4) at 79 km/h (49 mph). Simulated laps: 1:16.4 liter bike, 1:16.7 supersport 600, 1:18.2 middleweight twin.
All figures: physics-simulation estimates · generated 2026-10-02 · methodology & assumptions
Track outline © OpenStreetMap contributors (ODbL)
Harris Hill Raceway — quick facts
Motorcycle track guide · simulation estimates · 2026-10-02
- Layout: Clockwise — 2,922 m (1.82 mi) in the track model, 11 numbered corners: 4 left, 7 right
- Simulated lap estimates: 1:16.4 liter bike / 1:16.7 supersport 600 / 1:18.2 middleweight twin
- Simulated average speed: 132–135 km/h (82–84 mph) depending on bike class
- Slowest simulated point: Turn 10 at a 75 km/h (47 mph) minimum; tightest radius on the card at 37.4 m
- Fastest simulated entry: Turn 1 at 182 km/h (113 mph) in every class, Turn 6 close behind at 180 km/h (112 mph)
- Longest simulated brake zone: 123 m before Turn 4 (Santa Rita) on the liter bike, 117 m on the 600
- Biggest descent: Turn 5 drops 7.2 m (24 ft); biggest climb: Turn 10 rises 3.2 m (10 ft)
- Longest corner on the card: Turn 8 at 231 m of left-hand arc
Turn 1
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 182 km/h113 mph | 167 km/h104 mph | 173 km/h108 mph | 24 m79 ft | 184 m603 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
Turn 2
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 117 km/h73 mph | 98 km/h61 mph | 121 km/h75 mph | 69 m226 ft | 63 m207 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 2 is the first real braking event: a 117 m right with a 63.2 m effective radius, falling 1.2 m (4 ft). From 117 km/h (73 mph) on entry, the simulation brakes 69 m out on the supersport 600, 72 m on the liter bike and 63 m on the twin, down to a 98 km/h (61 mph) minimum that is identical across classes. The exit is 121 km/h (75 mph) in every class. The number to note is what follows: the exit speed here is close to the entry speed for Turn 3, which the model treats as the second half of the same right-hand arc.
Turn 3
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 119 km/h74 mph | 119 km/h74 mph | 163 km/h102 mph | 51 m167 ft | 113 m372 ft | -0.5 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
Turn 4 — Santa Rita
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 97 km/h60 mph | 79 km/h49 mph | 116 km/h72 mph | 117 m384 ft | 42 m136 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
Santa Rita is a 156 m right of 41.5 m effective radius, level to within 0.2 m, and it carries the longest braking zone on the circuit. The simulation arrives at 97 km/h (60 mph), the lowest entry speed on the course, with the marker 117 m out on the supersport 600, 123 m on the liter bike and 90 m on the twin, and bottoms at 79 km/h (49 mph) for every class — the second-slowest point of the lap. The exit is 116 km/h (72 mph) on the 600, 117 km/h (72 mph) on the liter bike and 115 km/h (71 mph) on the twin, a solid gain over the entry across the long arc.
Turn 5
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 107 km/h67 mph | 87 km/h54 mph | 141 km/h88 mph | 21 m69 ft | 50 m163 ft | -7.2 m-24 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 |
|---|---|---|---|---|---|
| 180 km/h112 mph | 167 km/h104 mph | 170 km/h106 mph | 39 m128 ft | 183 m600 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 7
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 106 km/h66 mph | 81 km/h51 mph | 138 km/h86 mph | 72 m236 ft | 44 m143 ft | -3.5 m-11 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 is the third-tightest corner on the card: 180 m of right-hand arc at a 43.6 m effective radius, falling 3.5 m (11 ft), the second-biggest descent on the lap. The simulation brakes from 106 km/h (66 mph) — 72 m out on the supersport 600, 75 m on the liter bike, 66 m on the twin — to an 81 km/h (51 mph) minimum shared by every class. The exit builds to 138 km/h (86 mph) on the two larger bikes and 135 km/h (84 mph) on the twin, helped by the descent, the biggest gain between minimum and exit anywhere on the course, and it feeds directly into the long left at Turn 8.
Turn 8
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 150 km/h93 mph | 119 km/h74 mph | 151 km/h94 mph | 27 m89 ft | 93 m306 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 9
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 162 km/h101 mph | 152 km/h95 mph | 159 km/h99 mph | 33 m108 ft | 153 m501 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 10
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 101 km/h63 mph | 75 km/h47 mph | 124 km/h77 mph | 60 m197 ft | 37 m123 ft | +3.2 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 11
| Entry | Min | Exit | Brake start | Eff. radius | Elev Δ |
|---|---|---|---|---|---|
| 162 km/h100 mph | 153 km/h95 mph | 176 km/h110 mph | 3 m10 ft | 154 m506 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