Tentsmuir Forest 8-hour Challenge

St Andrews, United Kingdom • 18 Oct 2025

The Tentsmuir Forest 8-hour Challenge, organized by NU Limits Running, is an endurance running event held in Tayport, United Kingdom. Participants aim to complete as many 4.366-mile loops as possible within an 8-hour time limit on trail paths around Tentsmuir Forest, featuring 85 feet of ascent per lap. Completing 3 laps equals a half marathon, 6 laps a full marathon, and 7 or more laps an ultra marathon. Runners use a clip card to track laps, with a final lap start cutoff at 7:59:59 hours and finish by 9 hours. The event fosters a supportive atmosphere focused on pushing limits and personal achievement. 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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