Teenagers taking on the Ten Tors challenge on Dartmoor have been gathering at Okehampton Camp on the edge of the national park before the start of the event, which takes place this weekend (May 8th and 9th).
It involves navigating across 26 miles of upland and ticking off ten granite tors along the way, something that Ordnance Survey maps
can help people taking part to do.
This year will see 400 teams taking part in the challenge, which has been run in its current form since 1961, having been devised by Lieutenant Colonel Lionel Gregory - the leader of the Junior Leaders Regiment of the Royal Signals - along with two fellow officers.
Despite the name, there will in fact be 19 manned tors, all of which have been marked on the Met Office website as it plans to provide regular weather updates to help those taking part.
It has forecast rain over the weekend, which will make waterproof jackets
important clothing for participants.
Posted by Brandon Egley