Ultra Trail Snowdonia 100km
- Total distance: 100 km
- Location: Snowdon
- Race Date: 16 May 2026
- Finish rate: 71%
- Nearest Station: Gilfach Ddu (0.1 km)
- Aid Stations: 7
- Night Running: 34.2% in darkness
- Pacing Complexity: Very High (88/100)
Ultra Trail Snowdonia 100km Overview
No overview text has been written for this race yet.
Quick Facts
- Entrance Cost: Unknown
- Organiser: UTMB
- Start Town: Snowdon
- Dogs Allowed: Unknown
- Start Date: 16 May 2026
- End Date: 16 May 2026
- Start Time: 5:30 AM
- Final Cut-off: 32.5 hours
Navigation
- Type: Unknown
- Closest Train Station: Gilfach Ddu
- Distance from Start Line: 0.1 km
Eligibility
- Minimum Age: 20 years
- Gender Eligibility: All genders
- Minimum Entry Criteria: Unknown
Terrain & Elevation
The course covers a genuine mix of surfaces, with trail (33%) and gravel (28%) 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. The longest unbroken stretch is 6.9 km of trail. Climbs are mostly on trail, though the surface varies across the ascents. Downhills are spread across a mix of surfaces, with gravel most common.
- Trail / Path33% · 31.3 km
- Gravel / Track28% · 26.6 km
- Grass18% · 16.8 km
- Rocky18% · 16.7 km
- Paved Road3% · 3.3 km
- Off-road / Unknown0% · 0.3 km
Distance
105.4 km
Ascent
6770 m
Descent
6770 m
High Point
1066 m
Technical km total
7.2 km
% of course
7%
In final third
0 km
In first third
7.2 km
Most technical terrain is concentrated early. Going too hard on technical ground at the start compounds fatigue over the remainder of the course. Disciplined early pacing on technical sections is key.
This race has a large ascent early on in the race, before a large descent until about 40km, before a large descent until about 66km, before a large descent towards the finish.
Compared against 20 other races of a similar distance, Ultra Trail Snowdonia 100km has more total elevation gain than 100% of them, and more elevation gain per kilometre than 100% of them — significantly hillier than typical for its distance.
Source: GPX Data
Climate
Navigation
No navigation/waymarking information available for this race yet.
Aid Stations
Stations
You'll need to keep an average pace of between 2.8 km/h and 3.8 km/h between aid stations to make the cut offs.
Stations
| KM | Name | Gap from Prev | Cut-off | Water | Cold Food | Hot Food | Hot Drinks | Gels | Medic | WC | Bags | Crew |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14.0 | 14.0 km | 5h | ✓ | – | – | – | – | ✓ | ✓ | – | – | |
| 29.3 | 15.3 km | 9h | ✓ | ✓ | – | – | – | ✓ | ✓ | – | ✓ | |
| 41.7 | 12.4 km | 13h | ✓ | ✓ | – | – | – | ✓ | ✓ | – | ✓ | |
| 54.0 | 12.3 km | 16h 30m | ✓ | ✓ | – | – | – | ✓ | ✓ | – | – | |
| 67.4 | 13.4 km | 20h 30m | ✓ | ✓ | – | – | – | ✓ | ✓ | – | – | |
| 81.6 | 14.2 km | 25h | ✓ | ✓ | – | – | – | ✓ | ✓ | – | ✓ | |
| 95.8 | 14.2 km | 29h 30m | ✓ | ✓ | – | – | – | ✓ | ✓ | – | – |
None of the aid stations on this course are confirmed to offer vegan food, so vegan runners should plan to carry their own nutrition.
Source: Not recorded
Night Running
Ultra Trail Snowdonia 100km starts at 05:30 local time, with sunset around 21:10. Based on the median finisher time of 23:53:22, a runner at that pace would finish around 05:23 — after dark, spending around 8h 10m (34% of their race) running in darkness and covering roughly 35.5 km of the course after sunset.
Shaded stretches are expected to be run in the dark
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