mtbgravel

South Downs 100

South Downs, UK · 4 July 2026

Difficulty: 4/5 — Very hard

A 100-mile or 100km gravel and MTB event traversing the South Downs Way, known for its significant climbing and long-distance endurance challenge.

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Distances
100 miles · 100km
Elevation
3,657 m
Surface
gravel, dirt
Typical W/kg
3.2–4

Rider fit

Who it's for

Endurance cyclists and mountain bikers looking for a classic, challenging ride on one of the UK's most iconic trails.

Who will struggle

Riders unprepared for significant climbing over long distances, or those seeking highly technical singletrack.

Training focus

Long-distance endurance, sustained climbing power, and efficient riding on chalky, off-road terrain.

Are you ready for this race?

Compare your W/kg to see how you stack up against this race's typical level — and which races fit you best right now.

FAQs

What are the distance options for the South Downs 100?+

There are two distance options: a 100-mile route and a 100km route.

What type of terrain can I expect?+

The event is predominantly off-road, described as 90% on classic South Downs chalk tracks.

How difficult is the event?+

It is renowned as a supreme physical challenge with significant climbing, described as a monumental endurance challenge.

Are e-bikes allowed?+

Yes, e-bikes are welcome provided they meet the definition of an electrically assisted pedal cycle (EAPC) and are legal for use on UK roads and bridleways.

Where do the 100 mile and 100km routes finish?+

The 100-mile route finishes at Beachy Head near Eastbourne, and the 100km route finishes at Truleigh Hill above Shoreham.

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