Ultra Running Hub Swanage, United Kingdom · Sunday, June 7, 2026
Fixed Distance 50K
BigSea Ultramarathon
Race completed
54 km Distance
not publishedn/a Climbing
2.7 est Grit · Entry level
Calculated from 54 km alone — the organiser has not published an elevation profile. Read 2.7 as a floor, not a verdict.
What the course asks
Time limit 9 hours
10:00 min/km average. Generous. Walkable throughout for most of the field. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Tighter than 79% of 50K races. Measured against 1007 races of the same distance. Cut-off calculator →
Field size ~109 Mid-sized. Company early, well spread out by halfway.
DUV results for the 2023 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, June
Daytime high 16°C
Night low 13°C
Rainfall Mostly dry
Daylight 16 h 18 m of light
Regional 2001-2020 average for June — NASA POWER, grid elevation 11 m. Not a forecast.
The Aid Station
Course-specific beta from the community
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 54 km of trail.
- Trail Running Shoes54 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition54 km of self-supported fuelling between aid stations.
- Hydration VestsFlask capacity for 54 km, without the bounce.
- GPS WatchesBattery life first — a 54 km day outlasts most full-GPS modes.
Similar races
Other 50K trail ultras, closest in distance first.