| Turnpoint | Distance | Direction | Observation zone |
|---|---|---|---|
| Naseby West | 4.70 km | 351.6° | Next, R=5.00 km, Angle=90.0°, Max.alt. is 1.22 km |
| Daventry N | 15.84 km | 216.2° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| Northampton West | 11.86 km | 118.8° | Symmetric, Rmin=0.50 km, Rmax=20.00 km, Angle=90.0°, Cylinder R=0.50 km |
| Eyebrook | 39.01 km | 28.1° | Symmetric, Rmin=0.50 km, Rmax=10.00 km, Angle=180.0°, Cylinder R=0.50 km |
| Thrapston | 22.27 km | 137.5° | Symmetric, Rmin=0.50 km, Rmax=10.00 km, Angle=180.0°, Cylinder R=0.50 km |
| HBX-HB Finish Ring | 32.58 km | 278.6° | Cylinder R=3.00 km |
| Total: | 121.56 km | ||