| Turnpoint | Distance | Direction | Observation zone |
|---|---|---|---|
| HB Start north | 5.39 km | 189.0° | Next, R=5.00 km, Angle=90.0°, Max.alt. is 1.40 km |
| Towcester | 38.63 km | 176.8° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| Rushden | 34.11 km | 52.8° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| Skeffington | 39.52 km | 326.3° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| HB control point east | 20.22 km | 173.8° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| HB Finish Ring | 7.26 km | 269.8° | Cylinder R=3.00 km |
| Total: | 139.73 km | ||