Date
Sat, 13 Mar 2027
Start
09:00
Venue
Keepers Car Park, Brechfa Forest, near Brechfa, Carmarthenshire, Wales
Carmarthenshire, Wales
Countdown
March
The full marathon is two laps of the same 13-mile loop, so you know what's coming second time round. Climbing is gentle, which makes this a pacing test more than a hill fight.
Key facts
01Mandatory kit check before the start, so pack everything on the list
02Compulsory kit includes waterproof jacket and trousers, space blanket and whistle
03Final cut-off is 17:00 for the whole field
Create a free training plan for the Brechfa Trail Races 42 km
7-day free trial, no card required
The course
One lap, on repeat
Carmarthenshire · one lap
Distance42km
Total climb129m
Start · finishOne lap · elevation
0 kmDrag map to rotate20.3 km
Weather
Mid-March, Carmarthenshire
9°CTypical high
4°CTypical low
-3°CColdest in 20 years
52%Days with rain
Highs around 9°C and lows around 4°C, but it has dropped to -3°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
Results
Course verified. Results not yet available.
Organiser
Training
Training for the Brechfa Trail Races 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 Brechfa Trail Races 42 km plan targets
Typical sessions
42 km with 129 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 Brechfa Trail Races 42 km plan.
7-day free trial, no card required.
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