Walesby, United Kingdom · Saturday, May 9, 2026

Fixed Distance 50 mi

Dukeries Ultra 40 Mile

Race completed

66 km Distance

not publishedn/a Climbing

3.3 est Grit · Challenging

Calculated from 66 km alone — the organiser has not published an elevation profile. Read 3.3 as a floor, not a verdict.

53.4163° N, 0.2950° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 10.5 hours 9:33 min/km average. Comfortable. Room to walk the climbs and stop at aid. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Tighter than 80% of 50 mi races. Measured against 455 races of the same distance. Cut-off calculator →

Field size ~93 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2024 edition (40.8mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, May

Daytime high 14°C

Night low 8°C

Rainfall Mostly dry

Daylight 15 h 29 m of light

Regional 2001-2020 average for May — NASA POWER, grid elevation 15 m. Not a forecast.

The Aid Station

Course-specific beta from the community

👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for 66 km of trail.

Trail Running Shoes66 km of trail — cushioning that is still there in the last quarter.
Race Nutrition66 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 66 km, without the bounce.
GPS WatchesBattery life first — a 66 km day outlasts most full-GPS modes.

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

Brooks

Catamount 3

RunRepeat found the Brooks Catamount 3 to have a cozier upper that enhances the overall fit, though breathability and durability could be better. iRunFar noted…

★★★★★ 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

Garmin

Enduro 3

Ultra-endurance GPS watch with solar charging and 300+ hour battery in GPS mode.

$900 ★★★★★ 4.8

All gear guides →

Course Notes

Starting in the heart of Sherwood Forest and keeping mostly to forest trails and footpaths, the route passes charming lodges, through Cresswell Crags and skirts the Welbeck Estate. It crosses Clumber Park and through peaceful farm land before looping

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