Borders 8-hour Challenge (NU Limits Running)

Borders 8-hour Challenge, organized by NU Limits Running, is a trail-based endurance event held at Borders Forest Park. Runners complete as many 4.366-mile loops as possible within an 8-hour window, with ascent of about 480 feet per lap. The loop counts toward milestones: 3 laps = half marathon, 6 laps = full marathon, 7+ laps = ultra.

The course is entirely on forest trails, with Basecamp facilities for kit storage, and on-site catering from Rock UK. An electronic wristband times each lap and logs progress. The event includes parking, spectator access, and accommodation options through Rock UK, plus opportunities to volunteer. Visit the organization's website for the most recent information.