Tenacious Ten Hour Endurance Challenge
RunningTimed laps
Date
Sat, 10 Jul 2027
Venue
Mynydd Troed, Pengenfford Common, near Talgarth, Powys, LD3 0EY
Talgarth, Powys
Countdown
July
Ten hours, one short 2.7-mile loop, and as many laps as you can stack up. You run, you pass the same spot again, and the only question is when you stop.
Key facts
01Minimum age 17
02Mandatory kit, with a kit check at registration
03Final bell at 10 hours; teams pool their loop totals
Create a free training plan for the Tenacious Ten Hour Endurance Challenge
7-day free trial, no card required
The course
One lap, on repeat
Talgarth · one lap
Total climb324m
Duration10hr
Start · finishOne lap · elevation
0 kmDrag map to rotate4.2 km
Weather
Early-July, Talgarth
19°CTypical high
10°CTypical low
6°CColdest in 20 years
53%Days with rain
Highs around 19°C and lows around 10°C, but it has dropped to 6°C. Rain on 53% of days.
NASA POWER data, 2006-2025, the week either side of race day
2024 results
Who finishes, and how
#RiderTimeGap
01Jo James01:25:07
02Nick Haley02:10:24
03Gary James04:55:25
63
Finishers
8:06:33
Median time
Overall · 2024 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
OrganiserLimitless Trails (Ellen Wood, founder and race director)
Websitelimitlesstrails.co.uk
Instagram@limitlesstrails
Running since2020
Training
Training for the Tenacious Ten Hour Endurance Challenge
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 Tenacious Ten Hour Endurance Challenge plan targets
Typical sessions
A sustained 10hr effort
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 Tenacious Ten Hour Endurance Challenge plan.
7-day free trial, no card required.
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