Date
Sat, 8 May 2027
Start
08:00
Venue
Cardiff Harlequins RFC, Diamond Ground, Forest Farm Road, Whitchurch, Cardiff CF14 7JN
Cardiff, Cardiff
Countdown
May
A trail marathon where you find your own way. Marshals only cover the critical junctions, so this is a proper navigation and self-reliance test, with 1,300 m of climbing on top.
Key facts
01Self-navigation required; marshals only at critical junctions
02Compulsory kit check: no kit, no entry. Includes waterproof trousers, whistle and 500 kcal food
038-hour overall time limit
Create a free training plan for the Radyr Trail Races 42 km
7-day free trial, no card required
The course
The route
Cardiff
Distance42km
Total climb1,300m
StartElevation
0 kmDrag map to rotate40.9 km
Weather
Early-May, Cardiff
15°CTypical high
7°CTypical low
2°CColdest in 20 years
44%Days with rain
Highs around 15°C and lows around 7°C, but it has dropped to 2°C. Rain on 44% of days.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
Training
Training for the Radyr 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 Radyr Trail Races 42 km plan targets
Typical sessions
42 km with 1,300 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 Radyr Trail Races 42 km plan.
7-day free trial, no card required.
Other races at Radyr Trail Races
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