Tentsmuir Forest 8-hour Challenge

St Andrews, United Kingdom • 18 Oct 2025

Tentsmuir Forest 8-hour Challenge, run by NU Limits Running, takes place at Tentsmuir Forest near St Andrews in Scotland. The event invites competitors to complete as many 4.366-mile trail loops as possible within an eight-hour window. Each lap climbs about 85 feet, and a clip-card system records completed laps.

A 3-lap tally equals a half marathon, 6 laps the full marathon, and 7 or more laps an ultramarathon. The route is on forest trails, with a GPX map available. Basecamp provides kit storage; spectators are welcome.

Entries are open via EntryCentral. Runners may store gear at Basecamp, and the event fosters a supportive, community atmosphere. Visit the organization's website for the most recent information.

Race information

4 mi
85 m+
8-Hour Timed Challenge (4.366 Mile Loops)
Visit the organization's website for the most recent information.
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