Llanberis, United Kingdom · Saturday, September 12, 2026

Fixed Distance 50K

Welsh 3000s Ultra Run

Race completed

48 km Distance

4,000 m Climbing

8.4 Grit · Hardcore

53.1180° N, 4.1275° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 83 m / km Vertical. Extreme verticality. This is a technical mountain course with sustained steep grades.

Typical conditions, September

Daytime high 16°C

Night low 13°C

Rainfall Showers likely

Daylight 12 h 59 m of light

Regional 2001-2020 average for September — NASA POWER, grid elevation 68 m. Not a forecast.

Course notes

terrain This is a vertical course. Poles are highly recommended for the sustained climbs.
gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.

Gear for this race

Chosen for 48 km of trail with 4,000 m of ascent.

Trail Running Shoes 83 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 48 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 4,000 m of ascent to walk up.
GPS Watches Battery life first — a 48 km day outlasts most full-GPS modes.

New Balance

Sense Ride 5

RunRepeat found the Salomon Sense Ride 5 to have immaculate lockdown and a smooth and stable ride, making it confident on moderate trails and steep downhills. I…

★★★★★ 4.5

Spring Energy

Awesome Sauce

Real food gel with 180 calories. Rice-based with natural flavors.

$4 ★★★★★ 4.6

Nathan

VaporKrar 12L

12L race vest co-designed with ultra champion Rob Krar, with insulated bladder pocket.

$170 ★★★★★ 4.6

Black Diamond

Distance FLZ

Lightweight folding trekking poles with FlickLock Z adjustment. 340g per pole.

$170 ★★★★★ 4.7

COROS

APEX 2 Pro

GPS running watch with 75-hour GPS battery, topo maps, and training metrics.

$500 ★★★★★ 4.7

All gear guides →

Overview

The Welsh 3000s Ultra Run, a 48-kilometer trail race, is held in Llanberis, United Kingdom. With 4000 meters of elevation gain, runners face a challenging 83.3 meters of climb per kilometer, significantly more than in most 50k races. This makes the Welsh 3000s Ultra Run a demanding event for its distance.

The race takes place in September. The entry fee for this event is £170. The course, while just under 50k, offers an intense test of climbing ability, distinguishing it from flatter 50k races.

Similar races

Other 50K trail ultras, closest in distance first.