2026 Cybi Coastal Marathon

Name: 2026 Cybi Coastal Marathon
Start: 2026-08-01
End: 2026-08-01
Location: Holyhead, United Kingdom

42KComboPast

BonusesScenic

Aug 1, 2026 · 1 day🇬🇧 Holyhead, United Kingdom

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Key Facts

Standouts

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A tough, scenic single-loop trail marathon that circumnavigates Holy Island (Ynys Cybi) on the Anglesey Coastal Path, with around +200 m of climbing and a signature steep summit of Holyhead Mountain near mile 22. It is not a certified road course, so it does not count as a Boston qualifier.

Why attend here

August in Holyhead brings long, mild days perfect for a coastal run, with the loop revealing sea cliffs, the South Stack lighthouse, and the final ascent of Holyhead Mountain. Afterward, wander the town's harbour and try fresh Welsh seafood, or simply enjoy the island's quiet beaches before the summer crowds peak.

Distance from you

From Columbus, US to Holyhead, GB

~7.3h · 5,849 km

Holyhead

combo

weather on the day

1 Aug 2026

18°13°

0.3mm6.9 m/s

9 Aug 2026

21°15°

0mm6.5 m/s

ComboPart of a combo trip

Cross-Disciplinary and Mechanistic Approaches to Investigate Neurodegeneration - Neurobiology of Brain Disorders Gordon Research Conference + 2 RacesAug 1 – Aug 9Castelldefels +2 sports

Event Details

Elevation

+200m

Course

The loop circles Holy Island past Silver Bay, Rhoscolyn and Trearddur Bay, along dramatic sea cliffs with views of the South Stack lighthouse, before the final climb of Holyhead Mountain (Mynydd Twr).