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RunThrough Snowdonia Sea2Sky 54k 25k & 12k Trail Races September 2026

United Kingdom flag
Barmouth, Wales, United Kingdom

calendar_today 05 Sep, 2026

directions_run Running

language Official Website

sell £40.00 – £95.00

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RunThrough Snowdonia Sea2Sky 54k 25k & 12k Trail Races September 2026

About the Event

Dive into the raw beauty and diversity of Eryri's landscape by signing up for RunThrough Snowdonia Sea2Sky. This thrilling adventure through rugged Wales takes participants on an all-terrain journey from Barmouth beach, winding its way to the summit of Cadair Idris and back down again. The route is a tapestry woven with coastal vistas, forest tracks, rocky paths, and expansive mountain trails—each offering unique challenges and moments of breathtaking beauty.
Runners traverse varied terrains under careful guidance, allowing them to maintain their rhythm as they climb and descend amidst panoramic views that stretch endlessly before them. Seamlessly crafted waymarking ensures clear navigation throughout the course's twists and turns, while an enthusiastic finish line awaits with energy that reflects every runner’s accomplishment.
This meticulously organized event adheres to UK Athletics (UKA) rules and TRA licensing requirements for a seamless experience focused solely on performance amidst stunning Welsh scenery. Participants can take advantage of a £2 discount by entering their Event Administration or Trail Running Association number during registration, adding an extra layer of value to this unforgettable adventure.
RunThrough Snowdonia Sea2Sky invites runners at every level into the heart of Eryri’s natural wonders, promising an experience that marries exhilarating terrain with superb organization and awe-inspiring views.

Races Offered

54k

Sep 05, 2026

straighten

Distance — 53K

terrain

Type — Running

timer

07:00

sell

£95.00

25k

Sep 05, 2026

straighten

Distance — 25K

terrain

Type — Running

timer

09:00

sell

£55.00

12k

Sep 05, 2026

straighten

Distance — 12K

terrain

Type — Running

timer

10:00

sell

£40.00

Weather History

These values represent the 3-year monthly averages for September in Barmouth.

thermostat Temperature
11.7° / 17.5°
wb_sunny Feels like
9.1° / 15.6°
light_mode Avg sunshine hours
7h 26m
water_drop Avg rainfall
8.3 mm
ac_unit Avg snowfall
—
air Avg wind speed
14.6 km/h (Gentle breeze)
opacity Sweat loss rate
Low
terrain Course conditions
Firm and slightly soft
sunny Max UV Index
Moderate (3.5)
humidity_mid Humidity
84.5%
wb_twilight Sunrise
06:51
nightlight Sunset
19:29

About Barmouth

Learn more about the host city, Barmouth.

Scenic view of

Barmouth is a town and seaside resort in Gwynedd.

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