South Downs 100 mile (Autumn Event)

OCT
3-4
2026
A single loop 100 miles trail race from Plumpton Racecourse across the South Downs, with 12,000 ft ascent, 12 aid stations, a 34 hour limit and a 50 mile qualifier requirement.
100 miles

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South Downs 100 Mile

The South Downs 100 miles is a single loop trail race through the South Downs National Park, starting and finishing at Plumpton Racecourse in East Sussex. The course covers 100 miles with approximately 12,000 ft of ascent and is around 95% trail and 5% road. The event includes 12 staffed aid stations and a total time limit of 34 hours.

Race facilities at Plumpton Racecourse include onsite camping, parking on the infield grass, toilets, showers and event registration. Entries include a mandatory GPS tracker and chip timing. The race is a UTMB Index event and awards 5 ITRA points.

Runners must be at least 20 years old and must hold a race qualifier of at least 50 miles completed within the last four years; evidence must be provided before race day. Two drop bags can be left at registration for transport to the Findon and Washington aid stations. Pacers are permitted to join runners from the Findon aid station onward. Some aid stations have cut off times and all runners must finish within the overall 34 hour limit.

The route is waymarked but competitors must download the GPX file as a navigation backup. There is a mandatory footbridge crossing at the railway near Southease. Mandatory kit checks will be carried out and include items such as a charged phone, foil blanket, hydration for at least one litre, whistle, warm hat and gloves, two headlamps, waterproof jacket, a bank card and cash, a downloaded route and a visible high visibility item. There is no formal sweeper vehicle so runners should plan transport in case of withdrawal. Visit the organization's website for the most recent information.

100 mi
100 Mile Race
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