| O.S. Ref | Description | Distance |
| 376725 | Start on the B4000, at the junction of the Wickfield Road, ½ mile east of Shefford Woodlands. | 0.000 |
| 448681 | Proceed south-eastwards on the B4000 to the roundabout at the junction with the A4 | 5.400 |
| 388719 | Circle the roundabout (M1, 2, 3) to retrace on the B4000 to a point at the east edge of a field gateway, 452 yards short of the M4 bridge where finish. | 10.000 |