| Turnpoint | Distance | Direction | Observation zone |
|---|---|---|---|
| HB start north | 5.39 km | 189.0° | Next, R=5.00 km, Angle=90.0° |
| Stretton | 40.07 km | 46.3° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| Corby | 27.74 km | 190.9° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| Thrapston | 15.10 km | 136.3° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| HBX-HB Finish Ring | 32.58 km | 278.6° | Cylinder R=3.00 km |
| Total: | 115.49 km | ||