About This Race
This 50-kilometer challenge follows the Greensand Way for 12 miles out from Dorking to Leith Hill, incorporates a demanding 5-mile loop section, then returns via the same Greensand Way route. The course features a mix of gentle ascents and sharp climbs totaling 4,192 feet of elevation gain, with technical terrain that demands respect and preparation.
This demanding 50K follows the Greensand Way for 24 miles combined with a technical 5-mile loop, featuring a mix of gentle ascents and sharp climbs. The route reaches its highest point at Leith Hill before returning runners to Dorking via the same scenic woodland paths.
Elevation Profile
The course gains 1,278m over 50km, with the steepest section between km 2–km 2.
Course Map
Route shown is approximate and for illustration purposes.
Practical Info
LGW - London Gatwick Airport
Best For
Notable Features
The course features 4,192 feet of total ascent with a distinctive out-and-back format that includes a gradual climb to Leith Hill on the outward journey and rewarding downhill sections on the return. The route combines 24 miles on the historic Greensand Way with a challenging 5-mile loop, creating a varied experience of gentle ascents, sharp climbs, and technical descents through Surrey's premier woodland terrain.
Prepare for This Race
GEAR GUIDE
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GEAR GUIDE
The Best Hydration Vests for Ultrarunning in 2026
A tested guide to the best hydration vests for ultra marathons and long trail races — from lightweight racing vests to high-capacity mountain packs.
RACE GUIDE
The Best Trail Races for Your First Ultra
A thoughtful guide to choosing your first ultra marathon — what to look for in a course, how to evaluate difficulty, and five races worth considering.
FROM THE TRAIL
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Elevation profiles reveal the true character of a trail race. Learn to read the shape of a course and understand what it means for your race day experience.
