Date
Sat, 12 Dec 2026
Start
11:00
Venue
Dare Valley Country Park, Aberdare, Rhondda Cynon Taf, Wales
Aberdare, Rhondda Cynon Taf
Countdown
December
A point-to-point half that runs from Resolven into Dare Valley rather than looping back. 670 m of climbing and seven hours make it a friendly way into trail.
Key facts
01Linear route: you start in Resolven and finish at Dare Valley
027-hour limit, and all courses close at 18:00
03Minimum age 18
Create a free training plan for the Celtic Trail Races 21 km
7-day free trial, no card required
The course
The route
Aberdare
Distance21km
Total climb670m
StartElevation
0 kmDrag map to rotate21.2 km
Weather
Mid-December, Aberdare
9°CTypical high
6°CTypical low
-2°CColdest in 20 years
63%Days with rain
Highs around 9°C and lows around 6°C, but it has dropped to -2°C. Rain on 63% 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 Celtic 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 Celtic Trail Races 21 km plan targets
Typical sessions
21 km with 670 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 Celtic Trail Races 21 km plan.
7-day free trial, no card required.
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