South Downs 50k

Race completed

50 km Distance

1,490 m Climbing

4.7 Grit · Challenging

50.8807° N, 1.0304° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 30 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Time limit 11 hours 13:12 min/km average. Comfortable. Room to walk the climbs and stop at aid. More forgiving than 64% of 50K races. Measured against 1058 races of the same distance. Cut-off calculator →

Typical conditions, July

Daytime high 23°C

Night low 13°C

Rainfall Mostly dry

Daylight 15 h 41 m of light

Regional 2001-2020 average for July — NASA POWER, grid elevation 62 m. Not a forecast.

Course notes

terrain This is a rolling course. Expect fast, runnable sections where rhythm is key.
gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.

Gear for this race

Chosen for 50 km of trail with 1,490 m of ascent.

Trail Running Shoes 30 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 1,490 m of ascent to walk up.
GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.

Adidas

Terrex Speed Ultra

RunRepeat found the Adidas Terrex Speed Ultra to have a grippy outsole and great lockdown, while iRunFar noted that the shoe works on a variety of trail conditi…

★★★★★ 4.5

Salomon

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

Maurten

Gel 100

Hydrogel technology for 25g carbs per gel with minimal GI distress.

$3.5 ★★★★★ 4.7

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

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 South Downs 50k was a 50-kilometer trail race that took place in Waterlooville, United Kingdom, on July 26, 2026. This fixed-distance event had an entry fee of £100.

With 1490 meters of elevation gain over 50 kilometers, the course featured 29.8 meters of climb per kilometer, making it a challenging prospect. The 11-hour time limit translated to a 13.2 minutes per kilometer cut-off pace. This cut-off was tighter than 36% of 50k cut-offs, but more generous than 64% of them, among a peer group of 1048 races.

Similar races

Other 50K trail ultras, closest in distance first.