Ultra Running Ltd MTC Cymrun
The end to end of Wales, Holyhead to Barry Island over six days.
256 Mile
412 km
Nobody has reviewed this one yet
No reviews of the MTC Cymrun, 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.
Ran it? Write the first reviewRunning it soon? Connect Strava and we will ask you about it the day you finish, so you do not have to remember to come back.
The course
Start time not confirmed yet — check with the organiser.
This file is from a previous running and the course may have changed since. If you are navigating with it, get the current version from Ultra Running Ltd first.
What you’re in for
The end to end of Wales on foot: six days from Holyhead to Barry Island on National Cycle Route 8 — Lôn Las Cymru — with the overnights at Caernarfon, Barmouth, Llanidloes, Glasbury and Merthyr Tydfil. 256 miles, averaging just over 42 a day, and each day is also sold as a standalone ultra. 407.5km in six days, from the 35-mile last day down the Taff to the 47-mile crossing of the Cambrian mountains from Barmouth. Preset cut-offs each day at a minimum 4 mph average, a warning the first time you fall below it, withdrawal the second. Nothing on the course after ten at night. Checkpoints roughly every eight miles, trackers with SOS, maps and GPX for entrants only.
Terrain and trail
Route 8 is traffic-free cycle path, old railway and quiet lane, hard-surfaced almost the whole way — road shoes, as supplied. The Mawddach Trail and the Taff Trail are the flat and famous bits; between them the route crosses the mountains of mid-Wales and the Brecon Beacons, and those two days carry most of the climb.

Partner · affiliate policy
Cut-offs
Six days on Cycle Path Route 8, stopping at Caernarfon, Barmouth, Llanidloes, Glasbury and Merthyr Tydfil. Preset cut-offs on each day.
How to enter
Tue, 4 Jul – Sun, 9 Jul 2028 · Not open yet
No entry link yet. Check Ultra Running Ltd’s site ↗
Add to your calendar · as an all-day entry, until the start time is confirmed
Common questions
- The MTC Cymrun is one distance: 256 Mile (412.0 km).