Date
Sat, 13 Mar 2027
Start
10:00
Venue
Keepers Car Park, Brechfa Forest, near Brechfa, Carmarthenshire, Wales
Carmarthenshire, Wales
Countdown
March
One lap of the 13-mile loop, the same course the marathon runners do twice. Modest climbing makes it a friendly way into trail running, with a later start than the marathon.
Key facts
01Mandatory kit check, and you must carry at least 500 ml of fluid
02Compulsory kit includes waterproof jacket and trousers, phone and 500 calories of food
03Final cut-off is 17:00
Create a free training plan for the Brechfa Trail Races 21 km
7-day free trial, no card required
The course
The route
Carmarthenshire
Distance21km
Total climb129m
StartElevation
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
2020 results
Who finishes, and how
#RiderTimeAvg speed
01Ellie-Rose Merriman1:53:2311.1 km/h
02Clark Shemaine2:12:169.5 km/h
03Rebecca Playle2:21:138.9 km/h
47
Women finishers
2:49:22
Median time
7.4 km/h
Median speed
Women · 2020 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
Training
Training for the Brechfa Trail Races 21 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 21 km plan targets
Typical sessions
21 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
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Get your Brechfa Trail Races 21 km plan.
7-day free trial, no card required.
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