Caernafon Airport, United Kingdom · Saturday, September 26, 2026

Fixed Distance 50K

Sea to Summit Yr Wyddfa

29 days to go

47 km Distance

5,600 m Climbing

10.0 Grit · Elite / extreme

What the course asks

Climbing rate 119 m / km Vertical. Extreme verticality. This is a technical mountain course with sustained steep grades.

Course-specific beta from the community

⛰️ terrain

This is a vertical course. Poles are highly recommended for the sustained climbs.

By UltraHub Expert

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

Chosen for 47 km of trail with 5,600 m of ascent.

Trail Running Shoes 119 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 47 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 5,600 m of ascent to walk up.
GPS Watches Battery life first — a 47 km day outlasts most full-GPS modes.