Date
Sat, 15 May 2027
Start
10:00
Venue
Parkwood Dolygaer, Merthyr Tydfil
Pontsticill, Merthyr Tydfil
Countdown
May
The short way into the OTT day. You run the marathon route as far as checkpoint 1 at 7 miles, then drop onto forestry tracks back to Parkwood.
Key facts
01Minimum age 18
Create a free training plan for the OTT Trail Marathon & 10 Mile Trail Race 16 km
7-day free trial, no card required
The course
The route
Pontsticill
Distance16.1km
StartElevation
0 kmDrag map to rotate17.2 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 16 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 16 km plan targets
Typical sessions
16 km
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 OTT Trail Marathon & 10 Mile Trail Race 16 km plan.
7-day free trial, no card required.
Other races at OTT Trail Marathon & 10 Mile Trail Race
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