Running
Three Trails Half Marathon
13 km
Five Trails Ultra & 3 Trails Half Marathon
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Trail in United Kingdom, Dorking
Distances
About
Five Trails Ultra is a 50k ultra with 1000m of ascent taking in the Serpent Trail, New Lipchis Way, South Downs Way and Monarchs Way near Petworth. The 3 Trails Half Marathon is a 13-mile trail race on the Serpent Trail. Both start from Westerlands near Graffham.
Catering & aid stations
Hot and cold drinks, water, squash, coke, bananas, nuts, sandwiches, crisps, and Tom’s Mum’s flapjack at checkpoints.
Pacers
Pacemakers will be present for the Five Trails Ultra to support runners at target times per Startwave. See registration page for wave times. Pacers will carry flags for visibility.
Results
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Typical weather in Dorking
Monthly averages based on historical data (2000–present).
Jan9°5°
↑ 08:16
↓ 16:45
Feb9°5°
↑ 07:34
↓ 17:38
Mar10°5°
↑ 06:35
↓ 18:26
Apr12°6°
↑ 06:27
↓ 20:15
May14°9°
↑ 05:34
↓ 21:02
Jun17°12°
↑ 05:11
↓ 21:34
Jul19°14°
↑ 05:28
↓ 21:27
Aug19°14°
↑ 06:11
↓ 20:41
Sep17°12°
↑ 06:58
↓ 19:36
Oct14°10°
↑ 07:44
↓ 18:30
Nov11°8°
↑ 07:36
↓ 16:37
Dec10°6°
↑ 08:15
↓ 16:19
Route maps
What's included in entry
- Race insurance
- Race number bib
- Electronic timing
- Drinks at checkpoints
- Food at checkpoints
- T-shirt available
- Tree planting option
FAQ
What is the cut-off for Five Trails Ultra?
The overall course time limit is 10 hours. There are intermediate cut-offs: 3.45pm at Checkpoint 3 (18 miles) and 6pm at Checkpoint 4 (25 miles). Anyone not reaching these checkpoints by this time will be transported back to the race venue.
What is the cut-off for Three Trails Half Marathon?
The overall time limit is 5 hours.
Is registration online-only?
Yes, entries are online only — no entries on the day.
What is the minimum age?
Minimum age is 16 years for Five Trails Ultra and 3 Trails Half; under 18s need a parent/guardian signature.
Are walking poles allowed?
Yes, walking poles are allowed. Headphones are permitted but must be removed at road crossings and checkpoints.
Is there a rolling start?
Yes, there is a rolling start option for Five Trails Ultra from 8:30–9:45am before the 10am mass start.
Last updated: Jun 5, 2026, 11:45:44 PM
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