| Turnpoint | Distance | Direction | Observation zone |
|---|---|---|---|
| HB start west | 4.92 km | 81.2° | Next, R=5.00 km, Angle=90.0° |
| Olney | 42.09 km | 138.0° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| Grafham Water | 32.34 km | 61.1° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| Oundle | 25.01 km | 332.0° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| HB Finish Ring | 39.94 km | 262.3° | Cylinder R=3.00 km |
| Total: | 139.37 km | ||