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Mountainous 100 mile ultra runs

Find mountainous 100 mile ultra runs near me in 2026/2027 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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Yr Wyddfa (Snowdon) is the highest mountain in England and Wales. Your challenge is to ascend and descend as many times as possible in 24 hours - solo or as a relay team.
  • Sat 11 - Sun 12 Jul
  • £129.99-£319.99
Caernarfon, Gwynedd, UK

Black Diamond Yr Wyddfa Snowdon24

Yr Wyddfa (Snowdon) is the highest mountain in England and Wales. Your challenge is to ascend and descend as many times as possible in 24 hours - solo or as a relay team.

  • 24 hrs trail running + 3182 ft ascent
  • Chip timing
  • Enter online
  • Mountainous
  • Traffic free
  • Relay
  • Age 18 & over
Climb from Glen Nevis to Sgurr an Iubhair, traverse remote Corrour and Loch Ossian, then race rugged trails, forests and singletrack to a spectacular Nevis Range finish on this mountain adventure.
  • Fri 18 - Sun 20 Sep
  • £160-£220
Fort William, Highland, UK

Skyline Scotland | Skyline Scotland 100M

Climb from Glen Nevis to Sgurr an Iubhair, traverse remote Corrour and Loch Ossian, then race rugged trails, forests and singletrack to a spectacular Nevis Range finish on this mountain adventure.

  • 100 miles fell running + 4600 m ascent
  • Chip timing
  • Enter online
  • GPS tracking
  • Mountainous
  • Age 18 & over
  • Mon 7 - Sat 12 Sep
  • £1,699-£2,099
Conwy, Clwyd, UK

Dragon’s Back Race

  • 6 days fell running
  • Thu 26 Nov - Sat 5 Dec
  • €2,600-€3,000
San José, Costa Rica

La Transtica | Extreme Race

  • 122 miles trail running + 9300 m ascent

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