Confront the ultimate test of endurance on Britain's most stunning coastline at The Oner Ultra Trail Run on Friday, June 6, 2026. This is the mother of all trail runs, a relentless 85-mile (136 km) non-stop journey along the iconic and unforgiving Dorset Coast Path, with a strict 24-hour cutoff to test your physical and mental limits. From start to finish, you'll battle steep climbs, technical terrain, and the raw power of the Jurassic Coast, pushing through day and night on one of the world's most beautiful long-distance trails. It's a race that demands deep respect, meticulous preparation, and unwavering grit, attracting only the most dedicated ultra-runners.
More than just a race, The Oner is a pilgrimage for those seeking to measure themselves against a truly legendary challenge. The entry fee reflects the scale of the undertaking and the comprehensive support required for such a remote and demanding coastal route. This is your chance to join an elite group of athletes who have conquered one of the UK's most revered and formidable ultra-distance events. If you have the resolve to face 85 miles of majestic cliffs, secluded coves, and relentless ascents, prepare for an adventure that will redefine your limits. Ready, set, go – the Dorset coast awaits.
Races Offered
Oner
Jun 06, 2026
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Distance —
136.8K
terrain
Type ——
timer
12:00
Weather History
These values represent the 3-year monthly averages for June in Dorset Coast.
thermostatTemperature
12.3° / 19.7°
wb_sunnyFeels like
10.0° / 17.7°
light_mode
Avg sunshine hours
12h 52m
water_drop
Avg rainfall
1.4 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
14.6 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
76.5%
wb_twilight
Sunrise
04:58
nightlight
Sunset
21:24
About Dorset Coast
Learn more about the host city, Dorset Coast.
Dorset is a county located in the middle of the south coast of England. It lies between the latitudes 50.512°N and 51.081°N and the longitudes 1.682°W and 2.958°W, and occupies an area of 2,653 km2. It spans 90 kilometres (56 mi) from east to west and 63 kilometres (39 mi) from north to south.