It starts in the Grove Green area of Maidstone, does a loop round the estate and then follows the A20 towards the M20, climbs slightly towards the foot of Hollingbourne Hill, turns left towards Thurnham, left towards Bearstead and back towards the Grove Green area. The finish is about 500 yards beyond the start.
Just one slight downside - the Black Lion at Thurnham only opens after the race has finished (or so my friend who thought he'd got a plum marshalling position last year, informs me).