Date
Sun, 14 Feb 2027
Start
07:00
Venue
Theatr Brycheiniog, Brecon
Brecon, Powys
Countdown
February
A winter run from Brecon down to Cardiff on an unmarked mountain route, so you navigate your own way. 76 km with 2,800 m of climbing, for experienced runners.
Key facts
01Unmarked route: you must navigate by GPS
02Compulsory kit required
0315-hour cut-off at 22:00, with 6 checkpoints
Create a free training plan for the Brecon to Cardiff Xtreme & Taff Xtreme Marathon 76 km
7-day free trial, no card required
The course
The route
Brecon
Distance76km
Total climb2,800m
StartElevation
0 kmDrag map to rotate72.6 km
Weather
Mid-February, Brecon
6°CTypical high
1°CTypical low
-8°CColdest in 20 years
52%Days with rain
Highs around 6°C and lows around 1°C, but it has dropped to -8°C. Rain on 52% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01Jennifer Hartley10:03:227.6 km/h
02Carly Evans10:21:557.4 km/h
03Emma Williams10:45:397.1 km/h
27
Women finishers
13:16:39
Median time
5.8 km/h
Median speed
Women · 2026 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
Training
Training for the Brecon to Cardiff Xtreme & Taff Xtreme Marathon 76 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Brecon to Cardiff Xtreme & Taff Xtreme Marathon 76 km plan targets
Typical sessions
76 km with 2,800 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Hill reps and vert to prepare the climbs and descents
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Brecon to Cardiff Xtreme & Taff Xtreme Marathon 76 km plan.
7-day free trial, no card required.
Other races at Brecon to Cardiff Xtreme & Taff Xtreme Marathon
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