Rasselbock Ultra

Race completed

50 km Distance

510 m Climbing

3.3 Grit · Challenging

53.1333° N, 1.2000° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 10 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.

Time limit 8 hours 9:36 min/km average. Tight. Room to walk the climbs and stop at aid. Tighter than 84% of 50K races. Measured against 1063 races of the same distance. Cut-off calculator →

Typical conditions, July

Daytime high 21°C

Night low 12°C

Rainfall Mostly dry

Daylight 16 h 37 m of light

Regional 2001-2020 average for July — NASA POWER, grid elevation 112 m. Not a forecast.

Course notes

terrain This is a fast & flat 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 510 m of ascent.

Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 50 km, without the bounce.
GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.

New Balance

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

Skratch Labs

Sport Hydration Mix

Clean electrolyte drink mix with real fruit flavor. Low sugar.

$20 ★★★★★ 4.5

Salomon

ADV Skin 12

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

$180 ★★★★★ 4.8

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 Rasselbock Ultra was a 50k trail race held in Mansfield, United Kingdom, and organised by Rasselbock Running. The race had a total elevation gain of 510 meters and a climb of 10.2 meters per kilometer. This made for a runnable course that presented less climbing than many other 50k races.

The cut-off time of 8 hours meant a pace of 9.6 minutes per kilometer was required to finish. This cut-off was tighter than 84% of 50k cut-offs, and more generous than 16%. The course comprised two and a half loops around Sherwood Pines Forest.

Similar races

Other 50K trail ultras, closest in distance first.