Date
Sun, 14 Feb 2027
Start
10:00
Venue
Theatr Brycheiniog, Brecon
Brecon, Powys
Countdown
February
The shorter way down: a point-to-point marathon from Merthyr to Nantgarw. 1,200 m of climbing over 42 km is a solid day out, not a brutal one.
Key facts
01GPS navigation needed to follow the route
02Compulsory kit required
0312-hour cut-off at 22:00, with 3 checkpoints
Create a free training plan for the Brecon to Cardiff Xtreme & Taff Xtreme Marathon 42 km
7-day free trial, no card required
The course
The route
Brecon
Distance42km
Total climb1,200m
StartElevation
0 kmDrag map to rotate41.0 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
01Claire Walters05:02:458.4 km/h
02Amy Dyer05:04:038.3 km/h
03Bethan Long06:04:036.9 km/h
20
Women finishers
6:30:27
Median time
6.5 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 42 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 42 km plan targets
Typical sessions
42 km with 1,200 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
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 42 km plan.
7-day free trial, no card required.
Other races at Brecon to Cardiff Xtreme & Taff Xtreme Marathon
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