| Turnpoint | Distance | Direction | Observation zone |
|---|---|---|---|
| HB start east | 6.20 km | 281.4° | Next, R=5.00 km, Angle=90.0°, Max.alt. is 1.62 km |
| Towcester | 32.17 km | 185.5° | Symmetric, Rmin=0.50 km, Rmax=10.00 km, Angle=180.0°, Cylinder R=0.50 km |
| Charwelton | 18.76 km | 292.1° | Symmetric, Rmin=0.50 km, Rmax=10.00 km, Angle=180.0°, Cylinder R=0.50 km |
| Corby | 50.47 km | 50.6° | Symmetric, Rmin=0.50 km, Rmax=10.00 km, Angle=180.0°, Cylinder R=0.50 km |
| Skeffington | 22.02 km | 311.1° | Symmetric, Rmin=0.50 km, Rmax=10.00 km, Angle=180.0°, 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 |
| HBX-HB Finish Ring | 7.26 km | 269.8° | Cylinder R=3.00 km |
| Total: | 150.90 km | ||