Brecon to Cardiff Xtreme & Taff Xtreme Marathon

The Brecon to Cardiff Xtreme is the mountain‑running edition of our classic ultra — a tough 75km winter challenge built for confident runners who love big climbs, technical terrain and wild ridgelines. ❄️🏔🔥

The Taff Xtreme Marathon joins the course at Merthyr, taking on the second half of the route — a demanding 26.2 miles with serious ascent and stunning valley views. 🏃‍♂️🌄

What to expect:

🏔 11 major peaks including Pen y Fan, Cribyn & Fan y Big

🔥 75km / 2800m ascent for the Xtreme Ultra

🏃‍♀️ 26.2 miles / 1200m ascent for the Taff Xtreme Marathon

🧭 Unmarked mountain route — GPS navigation required

🥤 6 checkpoints (Ultra) / 3 checkpoints (Marathon)

🎒 Indoor halfway checkpoint at Merthyr with drop‑bag access (Ultra only)

🌲 Remote forest ridgelines, technical descents & winter conditions

🏁 Finish at Coleg y Cymoedd with GPS tracking and a warm welcome

A true mountain‑to‑city winter adventure for runners who want something harder, wilder and unforgettable. ❄️🔥

Entry Options

Brecon to Cardiff Xtreme Ultra
Taff Xtreme Marathon

Refunds, Credits, Transfers, Substitutions

Refunds

No Refunds


Refunds

  • You may Refund yourself the entry cost less 25% until 14/09/2026.
  • You may Refund yourself the entry cost less 50% until 14/12/2026.
  • Click here for more info on Refunds.

Credits

  • You may exchange your entry for a Credit at a cost of £0.00 until 14/09/2026.
  • You may exchange your entry for a Credit at a cost of 25% of your ticket price until 14/12/2026.
  • You may exchange your entry for a Credit at a cost of 50% of your ticket price until 14/01/2027.
  • You may exchange your entry for a Credit at a cost of 75% of your ticket price until 31/01/2027.
  • You will have 12 months (from the date of the event) to spend your credit. You may also use your credit to enter someone else.
  • Click here for more info on Credits.

Ticket Transfers

Ticket Substitutions


Instalment Plan

  • You may pay in equal instalments up to a either a maximum set by the organizer or monthly up to one month before the event, whichever is less.
  • There is an additional fee of 1% + £0.50 for each instalment.
  • You are responsible for ensuring payments are made, missing payments may mean removal from the event and loss of any monies paid to date.
  • For more information on instalment plans see here.

You can manage your entries from the My Entries page.