The Winter Green Man Ultra is a 30 or 45-mile loop around the beautiful city of Bristol, following the distributed woodland of the Community Forest Path. The event is run by Ultra Running Limited and consists of four well-stocked checkpoints, chip timing, and pacers running at 9, 10, 11 and 12-hour times.

The race is run twice a year, once in the winter and again in the summer, offering two very different experiences of the course. The winter event is often muddy, providing challenging but fun conditions, and the summer event is firmer underfoot and faster to run. For added variation, the two events also run in opposite directions.