Snowdon Ultra - 100 Mile
- Total distance: 164.153 km
- Location:
- Race Date: 4 Sep 2027
- Finish rate: 52%
- Entry Cost: £229
- Navigation: GPX Only
- Pacing Complexity: High (63/100)
Snowdon Ultra - 100 Mile
- Distance
- 164.153 km
- Total ascent
- 6,750 m
- Cut-off
- 42h
- Date
- 4-5 September 2027
- Entry cost
- £229
Overview
No overview text has been written for this race yet.
Quick Facts
- Entrance Cost: £229
- Organiser: GB Ultras
- Start Town:
- Dogs Allowed: Unknown
- Start Date: 4 Sep 2027
- End Date: 5 Sep 2027
- Start Time: 6:00 AM
- Final Cut-off: 42h
Navigation
- Type: GPX Only
- Closest Train Station: Unknown
- Distance from Start Line: Unknown
Eligibility
- Minimum Age: 20 years
- Gender Eligibility: All genders
- Minimum Entry Criteria: You must have completed a race of at least 50 Mile before this race, with no time limit on when.
Toilets
- Hand Washing Beyond Sanitiser: Unknown
- Period Products Provided: Unknown
- Female Only Toilets: Unknown
Family & Spectators
- Baby Changing at Start: Unknown
- Family Friendly Spectator Areas: Unknown
- Flexible Deferral or Cancellation: Yes
Safety
- Marshalls at Isolated Areas: Unknown
- Safeguarding and Reporting Policy: Unknown
- Can Hide Location from Public Tracking: Unknown
Terrain & Elevation
The course covers a genuine mix of surfaces, with gravel (33%) and trail (27%) being the most common and neither clearly dominating. The terrain is highly fragmented, switching roughly every kilometre. This demands constant mental engagement and limits the ability to build a sustained rhythm from surface consistency alone. Climbs are mostly on gravel, though the surface varies across the ascents. Descents cover a variety of surfaces with no single terrain type dominating.
Snowdon Ultra - 100 Mile has 44.9 km of gravel / track, this is in the top 4% of all our races.
- Gravel / Track33% · 44.9 km
- Trail / Path27% · 37.2 km
- Grass14% · 19 km
- Paved Road12% · 17.9 km
- Rocky8% · 11.4 km
- Off-road / Unknown6% · 7.7 km
Distance
158.6 km
Ascent
6750 m
Descent
6751 m
High Point
1055 m
Paved RoadTrail / PathGravel / TrackGrassRockyMixed
Compared against 13 other races of a similar distance, Snowdon Ultra - 100 Mile has more total elevation gain than 92% of them, and more elevation gain per kilometre than 100% of them — significantly hillier than typical for its distance.
Source: GPX Data
Gradient
8.38%
Average climb gradient
Do you have experience of moderate climbs like Snowdon Ultra - 100 Mile's, which average 8.38%?
Snowdon Ultra - 100 Mile's climbs average 8.38%. If your training never rehearses sustained climbing at that gradient, race day will be the first time your legs meet it.
5.49%
Average descent gradient
Do you have experience of gentle descents like Snowdon Ultra - 100 Mile's, which average 5.49%?
Snowdon Ultra - 100 Mile's descents average 5.49%. If your training never rehearses sustained descending at that gradient, the downhills will empty your quads long before the finish.
Source: GPX Data
Climate
Pacing Complexity
Snowdon Ultra - 100 Mile scores 63/100 for pacing complexity, rated high.
Similar-distance races score a median of 41/100 (5 races compared).
Snowdon Ultra - 100 Mile is among the more pacing-complex races at this distance. The challenge is not just the total distance or ascent — it is the repeated need to change effort level. A fixed pace target is unlikely to work here. The dominant source of complexity is terrain type changes, which means preparation should include training runs that deliberately mix different intensities in sequence.
Source: GPX Data
Aid Stations
No aid station data available for this race yet.
Night Running
Snowdon Ultra - 100 Mile starts at 06:00 local time, with sunset around 19:57. Based on the median finisher time of 34:44:26, a runner at that pace would finish around 16:44 — after dark, spending around 11h 10m (32% of their race) running in darkness and covering roughly 54.9 km of the course after sunset.
Shaded stretches are expected to be run in the dark
Are you ready for Snowdon Ultra - 100 Mile?
Compare it to a race you've already run, or connect Strava and see the three biggest gaps between your training and what this course will ask of you.
