MTC Afanc

Merthyr Tydfil, United Kingdom • 18 Apr 2026

MTC Afanc

The MTC Afanc is an ultra-marathon event set to take place in Wales. This single-day challenge covers a total distance of approximately 39.7 miles (frequently rounded to 40 miles). It is a quadrennial event, occurring every four years, and serves as a standalone race while also functioning as Day 5 of the CYMRUN series, a six-day end-to-end crossing of Wales.

The course follows National Cycle Route 8 for its entire duration. Participants start at the River Wye Activity Centre in Glasbury and travel south through the landscape to reach the finish at the Leisure Village in Merthyr Tydfil. The route features an ascent of 4,214 feet and a descent of 3,925 feet.

There are three intermediate check-points along the route:

  • Llanfilo (8.6 miles)
  • Lock House (17.2 miles)
  • Merthyr Tydfil (28.1 miles)

This is a cup-free event, meaning participants must carry their own reusable drinking vessels. Check-points provide various food items such as malt loaf, cake, sandwiches, and sweets. A minimum average pace of 4 mph is required to remain in the race, with specific cut-off times enforced at each check-point. The field is limited to a maximum of 40 participants, which includes those competing in the full multi-day series.

Mandatory equipment includes a backpack, head torch with spare batteries, route maps, a compass or GPS device, a whistle, a mobile phone, an emergency food pack, and a basic first aid kit. All finishers receive a bespoke race medal, while the male and female champions are awarded trophies. Visit the organization's website for the most recent information.

Race information

40 km
Mtc Afanc Ultra Marathon
Visit the organization's website for the most recent information.
Trail runs nearby

Trail races based in Brecon with circular routes through Bannau Brycheiniog National Park. Options are 100 km, 75 km and marathon distances with marked junctions, multiple checkpoints, a compulsory kit list and GPS route files.

A Pretty Muddy 5k obstacle course at Coopers Field, Bute Park on 02 May 2026 where participants climb, crawl and slide to raise funds for cancer research. The event has a £50 minimum fundraising target and is for ages 13 and over.

Cwmdu is a 15.9 km fell race near Crickhowell with 920 m of climb over Pen Tir and Mynydd Troed. The route requires navigation and mandatory kit; entry fees include tea and cakes.

The Sirhowy Challenge is a 10 mile multi-terrain race featuring a 1,500ft climb to Machen Trig Point. Participants enjoy a scenic loop through the Sirhowy valley with awards and a finishers social at the local club.

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