Date
Sat, 15 May 2027
Start
09:00
Venue
Parkwood Dolygaer, Merthyr Tydfil
Pontsticill, Merthyr Tydfil
Countdown
May
A big day out in the Brecon Beacons: a loop that takes in Pen y Fan and Fan y Big, then circles Talybont Reservoir and climbs Tor y Foel before heading home.
Key facts
01Checkpoint 3 has a 15:00 cut-off, so plan your pace to clear it
02Minimum age 18
Create a free training plan for the OTT Trail Marathon & 10 Mile Trail Race 44 km
7-day free trial, no card required
The course
The route
Pontsticill
Distance44km
Total climb1,619m
StartElevation
0 kmDrag map to rotate43.5 km
Weather
Mid-May, Pontsticill
15°CTypical high
6°CTypical low
-2°CColdest in 20 years
48%Days with rain
Highs around 15°C and lows around 6°C, but it has dropped to -2°C. Rain on 48% 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 OTT Trail Marathon & 10 Mile Trail Race 44 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 OTT Trail Marathon & 10 Mile Trail Race 44 km plan targets
Typical sessions
44 km with 1,619 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
Hill reps and vert to prepare the climbs and descents
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 OTT Trail Marathon & 10 Mile Trail Race 44 km plan.
7-day free trial, no card required.
Other races at OTT Trail Marathon & 10 Mile Trail Race
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