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Running Calendar near Caernarfon 2025-2026

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Explore the top running races near Caernarfon for 2025-2026! We've gathered 35 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathons Marathons Trail Runs Triathlons
May 2026
May
10
Sunday

Snowdonia Half Marathon

Half Marathon
May
10
Sunday

Paddy Buckley Recce - Hebogs

Trail Run 15 km
May
15-17
Fr - Su

Ultra-Trail Snowdonia by Utmb

Trail Run 25 km 56 km 104 km 164 km
May
30
Saturday

Abersoch 10K

3 km 10 km
June 2026
Jun
14
Sunday

Slateman Triathlon & Duathlon

Triathlon Duathlon
Jun
20
Saturday

GB Ultras - Ultra Wales 50

Trail Run 51 mi
Jun
27
Saturday

Welsh 3000’s Ultra Run

Trail Run 50 km
Jun
28
Sunday

Paddy Buckley Recce Fun Run - Snowdon

Trail Run 20 km
July 2026
Jul
11
Saturday

Snowdon24

Trail Run 50 km 100 km 100 mi
Jul
12
Sunday

Snowdonia Trail Marathon Eryri

Trail Run 10 km Half Marathon Marathon
Jul
18
Saturday

Welsh 3000 Challenge (14 Peaks)

Trail Run 20 hr
Jul
21-23
Tu - Th

Paddy Buckley Round

Trail Run 100 km
September 2026
Sep
7-12
Mo - Sa

Montane Dragon's Back Race

Trail Run 380 km
Sep
12
Saturday

Welsh 3000’s Ultra Run

Trail Run 50 km
Sep
19-22
Sa - Tu

The Brutal Extreme Triathlons

Trail Run
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