Date
Sat, 30 Jan 2027
Start
12:00
Venue
Overflow car park of Bluebirds football ground, Sixbells, Abertillery
Six Bells, Blaenau Gwent
Countdown
January
A short, punchy 9 km trail run up and around a Welsh valley, with 550 m of climbing packed in. Quick to get round, but it expects you to turn up properly kitted.
Key facts
01Full kit is mandatory and enforced: no kit, no run
02Visit the checkpoints in order, then run back down the valley to finish
03At CP3 you must follow the flagged anticlockwise loop
Create a free training plan for the Cwm Nant-y-Groes
7-day free trial, no card required
The course
The route
Six Bells
Distance9km
Total climb550m
StartElevation
0 kmDrag map to rotate9.8 km
Weather
Late-January, Six Bells
7°CTypical high
3°CTypical low
-5°CColdest in 20 years
50%Days with rain
Highs around 7°C and lows around 3°C, but it has dropped to -5°C. Rain on 50% 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
01Katie Ironside1:04:528.3 km/h
02Emily Browne1:05:078.3 km/h
03Briony Latter1:05:568.2 km/h
11
Women finishers
1:27:40
Median time
6.2 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
OrganiserAlun Wood
Training
Training for the Cwm Nant-y-Groes
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 Cwm Nant-y-Groes plan targets
Typical sessions
9 km with 550 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 Cwm Nant-y-Groes plan.
7-day free trial, no card required.
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