Two Tunnels Races

A multi-distance trek and trail event from a Cirencester basecamp with a looped 100 km route and options from 10 km to 100 km, supported by marquee rest stops, GPS tracking, medical teams, camping and shuttle transfers.

Competitors run repeated hourly laps of 6706 metres at Breakheart Quarry until only one runner remains. The mixed trail loop has about 560 ft of ascent per lap and heads-up warnings are given before each start.

Trail races on 14 June 2026 in Cheddar Gorge and the Mendip Hills offer distances from 1 km to Marathon plus an Omnium multi event. Courses include marked trails, varied terrain, frequent feed stations and event medals for 6 km and longer.

Run as many 3.28 mile laps as you wish along the scenic Stroud Waterways canal. This flexible timed event caters to all distances from 5k to ultra marathon with a seven hour time limit and a relaxed start window.