Sat
24
Oct
2026
Marathon Eryri
Llanberis, GwyneddWAL
Eryri (Snowdonia)
Marathon· Road
Marathon Eryri — Llanberis, Gwynedd, Wales.
EventsFind this location on a map 4 editions
WALRunningTrail (provisional)163K · 163 km / 101.3 mi164.4K · 164.4 km / 102.2 mi168K · 168 km / 104.4 mi169.7K · 169.7 km / 105.4 mi
Ultra-Trail Snowdonia by UTMB® — UTS 100M
Llanberis, Gwynedd · WAL
No future date listed
About Ultra-Trail Snowdonia by UTMB® — UTS 100M
Ultra-Trail Snowdonia by UTMB® — UTS 100M is a running event in Llanberis, Gwynedd, Wales. Recorded disciplines include 163K, 164.4K, 168K, 169.7K. The listed surface is trail (provisional). No future date is currently listed on ATHRECS. The ATHRECS archive includes editions from 2023 to 2026. This describes the editions recorded here, not the event's founding date or complete history.
Athlete profiles
Explore some of the athletes with recorded results at Ultra-Trail Snowdonia by UTMB® — UTS 100M.
Dates, starts & entry
Times are local to the race. Select the entry route for your distance.
The next date has not been announced here. Check the race website for updates.
Location & race day
Listed venue / area
Llanberis, GwyneddWAL
Confirm the exact start line, parking and arrival instructions with the organiser. A listed town or postcode may cover a wider area.
About the race
Historical course record. Trail classification is provisional, based on inclusion in the UTMB Index; course surface has not been independently verified. Actual course distances are retained separately from UTMB Index categories.
- Surface:
- Trail (provisional)
Results
Public-figure or athlete-approved ATHRECS results, plus verified organiser links.
Fri, 15 May 2026
163K · 163 km / 101.3 mi
Fri, 16 May 2025
169.7K · 169.7 km / 105.4 mi
Fri, 10 May 2024
164.4K · 164.4 km / 102.2 mi
Fri, 12 May 2023
168K · 168 km / 104.4 mi
Past races
163K · 163 km / 101.3 miFinishedResults
Fri, 15 May 2026
Historical UTMB source record. Trail classification provisional. Ascent 9200 m. UTMB Index category 100M is not the course distance.
169.7K · 169.7 km / 105.4 miFinishedResults
Fri, 16 May 2025
Historical UTMB source record. Trail classification provisional. Ascent 9660 m. UTMB Index category 100M is not the course distance.
164.4K · 164.4 km / 102.2 miFinishedResults
Fri, 10 May 2024
Historical UTMB source record. Trail classification provisional. Ascent 9949 m. UTMB Index category 100M is not the course distance.
168K · 168 km / 104.4 miFinishedResults
Fri, 12 May 2023
Historical UTMB source record. Trail classification provisional. Ascent 10280 m. UTMB Index category 100M is not the course distance.
More running nearby
Sat
23
Jan
2027
Fri
14
May
2027
Eryri by UTMB®
Llanberis, GwyneddWAL
100K / 100M / 20K / 50K / Ultra· Trail
Eryri by UTMB® — an official UTMB World Series Event.
UTMB World Series EventSat
10
Jul
2027
Snowdonia Trail Marathon Eryri
Llanberis, GwyneddWAL
13.2mi / 27.2mi / 44.1K / 9.8K· Trail
Snowdonia Trail Marathon Eryri in Llanberis.
Date
TBC
XTERRA Snowdonia Trail Marathon Eryri — SNOWDONIA TRAIL ULTRA MARATHON ERYRI, STOPPED, SHORTENED
Llanberis, GwyneddWAL
43.2K· Trail (provisional)
Historical results collected from the UTMB Index.
1 past editions
Race detailsDate
TBC
Ultra-Trail Snowdonia by UTMB® — ERYRI 25K
Llanberis, GwyneddWAL
22K / 24.5K / 25.4K / 25K· Trail (provisional)
Historical results collected from the UTMB Index.
4 past editions
Race detailsDate
TBC
Ultra-Trail Snowdonia by UTMB® — UTS 100K
Llanberis, GwyneddWAL
101.1K / 101.9K / 103.8K / 104.6K / 104K / 106K / 84.6K / 86.2K· Trail (provisional)
Historical results collected from the UTMB Index.
8 past editions
Race detailsDate
TBC
Ultra-Trail Snowdonia by UTMB® — Eryri 50K
Llanberis, GwyneddWAL
50K / 51.4K / 55.6K / 55K / 56K / 57.7K· Trail (provisional)
Historical results collected from the UTMB Index.
6 past editions
Race details