For seven winters, runners have flocked to the Celtic Trail Races, an invigorating series of trail events set against the backdrop of Wales' dramatic landscapes. Three distinct challenges cater to all levels: a grueling 50K ultra, a full marathon, and a classic half marathon that spans linear terrain. Navigational worries are alleviated by fully marked routes, allowing participants to immerse themselves in the stunning scenery without concern for direction. The courses wind through the enchanting Afan Forest and the rugged Rhigos mountain range before concluding on the high trails of Coed Morgannwg Way. Sharp ascents and long descents characterize these journeys, alongside river crossings and secluded single-track paths. Participants will encounter serene reservoirs hidden deep within ancient woodlands, towering wind turbines that punctuate the skyline, and panoramic vistas across the Brecon Beacons National Park. The adventure concludes with a thrilling descent into Dare Valley Country Park, where all races converge in festive cheer for an exhilarating finish line celebration. Each race distance culminates at the picturesque Dare Valley Country Park, offering rugged trails, breathtaking views, and a lively atmosphere that marks the perfect conclusion to any runner's year. In addition to the challenging terrain and stunning scenery, entrants have the option of purchasing XCover insurance, providing peace of mind in case unforeseen circumstances prevent attendance. Experience the raw beauty and historical allure of Wales' wild trails at the Celtic Trail Races – a winter adventure not soon forgotten. Join us for an unforgettable race experience this season.
Races Offered
Half Marathon
Dec 12, 2026
straighten
Distance —
21.1K
terrain
Type —
Running
timer
151 days remaining
sell
£42.00
Marathon
Dec 12, 2026
straighten
Distance —
42.2K
terrain
Type —
Running
timer
151 days remaining
sell
£52.00
Ultra (34 mile)
Dec 12, 2026
straighten
Distance —
54.7K
terrain
Type —
Running
timer
151 days remaining
sell
£62.00
Weather History
These values represent the 3-year monthly averages for December in Dare Valley Country Park.
thermostatTemperature
4.1° / 7.5°
wb_sunnyFeels like
-1.2° / 2.9°
light_mode
Avg sunshine hours
2h 25m
water_drop
Avg rainfall
9.0 mm
ac_unit
Avg snowfall
0.1 cm
air
Avg wind speed
19.9 km/h (Gentle breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Low (1.4)
humidity_mid
Humidity
92.7%
wb_twilight
Sunrise
09:12
nightlight
Sunset
17:05
About Dare Valley Country Park
Learn more about the host city, Dare Valley Country Park.
Dare Valley Country Park is a public park in Wales. It lies near the village of Cwmdare and the town of Aberdare, Cynon Valley, in Rhondda Cynon Taff, South Wales. It comprises 500 acres (2.0 km2) of woodlands, pasture and moorland mountainside. It is maintained by the local Council, Rhondda Cynon Taf.