Question 1

What counts as an ultra marathon?

Accepted Answer

Any running race longer than the standard marathon distance of 42.195 km (26.2 miles). Common ultra distances are 50K, 50 miles, 100K and 100 miles.

Question 2

What's the shortest ultra marathon distance?

Accepted Answer

50 kilometres (31 miles) is the traditional entry-level ultra and a good first step from the marathon distance. Many UK 50Ks run on trail or canal-side routes.

Question 3

How long does it take to train for a 50K ultra?

Accepted Answer

Most runners need 16 to 24 weeks if they already have marathon experience. Training focuses on time on feet rather than mileage, with long runs of 4 to 6 hours.

Question 4

Do UK ultras require mandatory kit?

Accepted Answer

Yes — most ultras require waterproof jacket, hat, gloves, food, water, whistle and map. Mountain and longer events often add survival bag, head torch and spare layers. Always check the race-specific kit list.

Ultra Marathons in Wales 2026

Upcoming ultra marathons in Wales

The Loop Ultra

Brenig Way 50K Trail

Black Beacon Mountain Races

Beacons Ultra, Beacons Marathon & Beacons Half Marathon

Off The Tarmac Ultra Marathon

Coast2Coast Winter Ultra

The Anglesey 3 Peaks Run Challenge

Slate Trail Ultra

Sea 2 Summit | Offa's Dyke Half/Full/Ultra

Other distances in Wales

Ultra Marathons in other UK regions

Frequently asked questions