A 7.2 mile circular walk atop the Marlborough Downs and passing through Fyfield Down Nature Reserve. Here you'll see the Grey Wethers or Sarsen Stones, neolithic limestone blocks left over from the last ice age.
Fyfield Down also has some of the rarest lichen in the country.
The route includes a lovely valley track and is mostly well drained apart from a couple of sections used by 4x4's.
There is free parking at Preshute Down car park, near the White Horse hill figure.