Trails & Tarmac Backyard Ultra
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Event overview
Trails & Tarmac 12hr Backyard Ultra takes place on 15 November 2025 in Crickhowell, Powys, set in the Black Mountains. The event is organised by Limitless Trails. Entries open 22 January 2025 and close 8 November 2025. The minimum age to enter is 17 or older. The entry fee is £75. Trophies are awarded to the first three finishers. Anyone completing a yard receives a medal; a special medal is awarded to those who reach 32 miles.
Format and course
The event uses a backyard ultra format with multiple one-hour loops. Key distances:
- 4.2-mile loop
- 32 miles (special medal)
- 12-hour cap
The route is approximately 50/50 trail and tarmac, with one gradual climb, one short steep section, and otherwise relatively flat terrain. The first eleven loops must be completed within an hour each to be counted. The final loop (the 12th) is a race to determine the winner. Timing will be available.
Rules and support
Runners must start each loop at the bell and may not leave the course during a loop except for restrooms. No personal aid is allowed during a loop; common aid stations are provided, including one at HQ. Artificial aids such as trekking poles are not allowed. Supporter rules include no supporters in the starting corral and no phone calls to or from runners on the course except in an emergency. Medics, showers, toilets, photographers, and a pop-up kitchen are provided. Parking at HQ is charged and enters a ballot for a free event. Visit the organization's website for the most recent information.