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Ultra Challenge Thames Path Challenge

Putney Bridge, LondonSat, 11 Sept – Sun, 12 Sept 2027

A hundred kilometres of Thames towpath from Putney Bridge to Henley, or seventy-five, fifty or twenty-five of it.

DistanceAscentPer km
100km350 m4 m
72km——
50km 1st Half200 m4 m
50km 2nd Half150 m3 m
28km 1st Quarter——
22km 2nd Quarter——
Henley 10K——
riversideflatMarked course

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No reviews of the Thames Path Challenge, and nothing on what people wore. Both are things no organiser publishes and every runner wants before they enter — how it actually went, and what was on your feet.

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Pick your distance

Start time not confirmed yet — check with the organiser.

What you’re in for

The Thames towpath upstream from Bishops Park at Putney Bridge to Henley: Richmond, Hampton Court, Runnymede at halfway, Windsor, and a riverside finish, 100km with 350m of climb on the organiser's figures — the flattest 100km they run. Halves of 50km either side of Runnymede, a 72km from Hurst Park, quarters of 22 to 28km, and a Henley 10K. Mid-September, through Saturday night for the continuous distance. An Ultra Challenge event, which means walkers, joggers and runners on the same course, signed with pink arrows and glow sticks after dark, with a covered rest stop every twelve kilometres or so — food, drink, medics, toilets — and a bigger one every twenty-five. Runners can enter with a target time; most of the field will be walking.

Terrain and trail

Towpath the whole way: tarmac and pavement through London, gravel and compacted earth further up, a few sections of grass and one or two of road where the path leaves the bank. Flat, and it is the flatness that wears you down. A road shoe.

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How to enter

Sat, 11 Sept – Sun, 12 Sept 2027 · Entries open

Enter on their website ↗

Entries are handled by Ultra Challenge, not by us. We take nothing for sending you there.

Add to your calendar · as an all-day entry, until the start time is confirmed

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Common questions

The Thames Path Challenge offers 7 distances: 100km (62.1 miles), 72km (44.7 miles), 50km 1st Half (31.1 miles), 50km 2nd Half (31.1 miles), 28km 1st Quarter (17.4 miles), 22km 2nd Quarter (13.7 miles), Henley 10K (6.2 miles).

Past runnings

2026Sat, 12 Sept 2026