Logo

Ultra-Trail Snowdonia by Utmb

Llanberis, United Kingdom • 16-18 May 2025

The Ultra-Trail Snowdonia by UTMB is a renowned trail running event held in the rugged landscapes of North Wales. As part of the UTMB® World Series, it features challenging courses with distances ranging from 25 km to 168 km, including significant elevation gains up to 9,500 meters. The event attracts international participants who experience the stunning, mythical scenery of Snowdonia National Park. Known for its technical trails and breathtaking vistas, the race offers a unique atmosphere of adventure and camaraderie. It showcases the wild beauty of the region while testing runners' endurance and resilience in a spectacular setting. Visit the organization's website for the most recent information.

United Kingdom Wales Llanberis

Race information

Website
UTMB 20K UTMB 50K UTMB 100K UTMB 100M
168 km
9500 m+
Uts 100m
100 km
6400 m+
Uts 100k
50 km
3300 m+
Uts 50k
25 km
1300 m+
Eryri 25k
Visit the organization's website for the most recent information.
Trail runs nearby

Welsh 3000’s Ultra Run

Llanberis

The Welsh 3000's Ultra Run is a guided mountain running event held in Snowdonia, North Wales, covering the classic 15 peaks over 3,000 feet. Spanning approximately 30 miles (50 km) with 4,000 meters of ascent, the route traverses the Carneddau, Glyderau, and Snowdon ranges, including the challenging..

Pen Llyn Ultra Summer Edition

Pwllheli - 20 mi from Llanberis

The Pen Llyn Ultra Summer Edition is a challenging ultra marathon event held in North Wales, featuring distances of 50 and 75 miles within 24 hours, and a 100-mile race completed in 29 hours. The course showcases the raw, rugged beauty of the Wales Ultra Trail Coastal Path, traversing some of the mo..

Xterra Snowdonia Trail Marathon Eryri

Llanberis

The XTERRA Snowdonia Trail Marathon Eryri is a premier trail running event held in Llanberis, North Wales, known as Wales' outdoor capital. Participants can choose from a 10k, half marathon (12.9 miles), marathon (27.3 miles), or ultra marathon (57 km), all featuring challenging routes through Snowd..

UTMB Index

Snowdon24

Llanberis

Snowdon24 is a 24-hour ultra trail running event held in Llanberis, Eryri (Snowdonia), featuring multiple ascents and descents of Yr Wyddfa (Snowdon), the highest mountain in Wales and England at 1,085 meters (3,560 feet). Participants, either solo or in teams of up to five, aim to complete as many..

UTMB Index

Welsh 3000 Challenge (14 Peaks)

Capel Curig - 8 mi from Llanberis

The Welsh 3000 Challenge (14 Peaks) is a demanding mountain running and walking event held in Snowdonia, Wales, starting near Capel Curig. Participants aim to summit all 14 peaks over 3000 feet in a continuous journey covering about 50 km with nearly 4000m of ascent. Highlights include climbing Snow..

Paddy Buckley Round

Capel Curig - 8 mi from Llanberis

The Paddy Buckley Round is a challenging, professionally guided running event held in Northern Snowdonia, Wales. Covering a loop of just over 100 km with approximately 9,000 meters of ascent and descent, it includes 47 mountain tops across major ranges such as Moelwyn and Nantle Ridge. The event is..