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Endurancelife CTS Dorset

Swanage, DorsetSat, 5 Dec 2026

The Jurassic Coast from Swanage. Graded Extreme.

DistanceAscentPer km
52 km Ultra1,134 m22 m
42.2 km Marathon1,018 m24 m
21.2 km Half Marathon445 m21 m
10K176 m17 m
grasscliffMarked course

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No reviews of the CTS Dorset, 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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HARD

TRP grade · E2·T3

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What you’re in for

Out of Swanage along the Jurassic Coast, a World Heritage stretch where the cliffs run through a few million years of geology with the sea underneath the whole time. Endurancelife rate the terrain extreme, which for a coast path means the climbs come one after another rather than being long. Four distances from 10K to an ultra of 32.3 miles with 4,416 ft of climb. Fully marked, no navigation.

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How to enter

Sat, 5 Dec 2026 · Entries open

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Common questions

The CTS Dorset offers 4 distances: 10K (6.2 miles), Half Marathon (21.2 km / 13.2 miles), Marathon (42.2 km / 26.2 miles), Ultra (52.0 km / 32.3 miles).