Dive into an exhilarating adventure with the Limitless Trails BYU Series, where tradition meets innovation on the rugged terrain of the Black Mountains near Crickhowell. This unique race challenges participants to navigate a 4.2-mile loop that seamlessly blends trail and tarmac in equal measure, offering runners both scenic beauty and fast-paced sections. The course features minimal elevation changes, with just one gentle incline and a brief steep stretch, making it an ideal setting for those seeking speed and efficiency. Participants are encouraged to push their limits as they aim to complete at least 32 miles (the Ultra distance) in order to earn medals. The true prize, however, goes to the last person standing who will be crowned with a prestigious winner’s trophy. Supportive amenities such as refreshments and hot food become available after the fifth loop, ensuring that runners remain fueled throughout their endurance journey. Race regulations are designed to maintain fairness: participants must start each hour on the hour from a designated starting corral without delay; staying on course is mandatory except for brief restroom breaks; and slower runners must yield to faster ones during overtaking. The race commences on Friday evening, with specific timing details communicated via email three days prior. This unconventional format tests not only physical endurance but also mental fortitude as competitors push through the night towards an open-ended finish line. Will you be the one who endures until the very last loop? Prepare for a thrilling and unforgettable experience where every mile brings new challenges and opportunities to demonstrate your grit, determination, and passion for running.
Races Offered
Backyard Ultra
Sep 19, 2026
straighten
Distance —
160.9K
terrain
Type —
Running
timer
171 days remaining
Backyard Ultra (4.167 mile loop)
Feb 06, 2027
straighten
Distance —
160K
terrain
Type —
Running
timer
171 days remaining
sell
£100.06
Weather History
These values represent the 3-year monthly averages for February in Crickhowell.
thermostatTemperature
11.3° / 17.6°
wb_sunnyFeels like
9.4° / 15.8°
light_mode
Avg sunshine hours
6h 43m
water_drop
Avg rainfall
4.6 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
13.0 km/h (Gentle breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (3.5)
humidity_mid
Humidity
86.7%
wb_twilight
Sunrise
06:48
nightlight
Sunset
19:25
About Crickhowell
Learn more about the host city, Crickhowell.
Llangattock is a village, community and electoral ward in the Brecon Beacons National Park in Powys, Wales. It lies in the Usk Valley just across the river from the town of Crickhowell. The Monmouthshire and Brecon Canal passes through the village en route between Brecon and Pontypool. It is in the historic county of Breconshire.