The Summer GMU
Bristol, United Kingdom • 23 Aug 2025
The Summer GMU (Green Man Ultra) is a challenging ultra marathon held near Bristol, UK, featuring two race distances: 45 miles and 30 miles. Both races follow the same course clockwise on the Community Forest Path, with the 45-mile race starting and finishing at Ashton Park School, and the 30-mile race starting at The White Horse, Hambrook, finishing at Ashton Park. The course includes four checkpoints offering food and drink, and runners must navigate the route themselves, with optional pacing groups called "timelords." All finishers receive bespoke medals and technical t-shirts. The event emphasizes safety with mandatory kit requirements and has a 12-hour cut-off time. Visit the organization's website for the most recent information.