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worldsmarathons.com

Tenacious Ten Ultra

calendar_today 10 Jul, 2027

directions_run Running

language Official Website

sell £60.13

Tenacious Ten Ultra

About the Event

Nestled within Wales' stunning Black Mountains, Mynydd Troed stands as an imposing challenge for endurance runners seeking to test their limits. This 10-hour race offers participants a relentless loop course of just over two miles, packed with steep climbs and technical descents that will push even the most seasoned athletes.
The route begins at the base of Mynydd Troed, where competitors face a grueling ascent towards the summit. Once atop, runners are rewarded with breathtaking panoramic views stretching across both the Black Mountains and Brecon Beacons, including the serene Llangorse Lake nestled in the valley below. However, the true test lies ahead as runners must navigate the challenging terrain that characterizes this mountainous landscape.
Each lap presents a formidable elevation gain of over 1000 feet, with sections ranging from runnable trails to steep and technical descents requiring agility and strength. The course is marked thoroughly, guiding participants through two clip stations—one at the trig point and another near the base—where they must clip their laminated cards as proof of completion.
Participants have the option to run solo or join teams of up to four members. Regardless of team size, a strict 10-hour time limit ensures that only those capable of maintaining a steady pace will complete multiple laps. The challenge is intensified by the fact that any runner not back at base before the final bell will lose their last lap towards the overall tally.
The event celebrates both individual and collective achievements, with teams competing under a "last man standing" rule where all members' efforts contribute to the team's total number of completed loops. This unique format fosters camaraderie among competitors while pushing each runner to their absolute limit.
With its combination of scenic beauty and physical demands, Mynydd Troed offers an unforgettable experience for runners eager to conquer one of Wales’ most challenging mountain races.

Races Offered

10 hours - 2.7 mile loop SOLO

Jul 10, 2027

straighten

Distance — 50K

terrain

Type — Running

timer

300 days remaining

sell

£60.13

Weather History

These values represent the 3-year monthly averages for July in Crickhowell.

thermostat Temperature
12.8° / 20.0°
wb_sunny Feels like
11.2° / 17.9°
light_mode Avg sunshine hours
9h 55m
water_drop Avg rainfall
3.0 mm
ac_unit Avg snowfall
air Avg wind speed
13.5 km/h (Gentle breeze)
opacity Sweat loss rate
Moderate
terrain Course conditions
Firm and slightly soft
sunny Max UV Index
Moderate (5.6)
humidity_mid Humidity
80.3%
wb_twilight Sunrise
05:13
nightlight Sunset
21:21

Hotels & Places to Stay

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