La Diagonale des Yvelines 50km

Race completed

50 km Distance

500 m Climbing

3.3 Grit · Challenging

48.7269° N, 1.7997° E© 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 9 hours 10:48 min/km average. Generous. Walkable throughout for most of the field. Tighter than 71% of 50K races. Measured against 1007 races of the same distance. Cut-off calculator →

Field size ~407 Large. Rarely out of sight of another runner.

DUV results for the 2026 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, April

Daytime high 16°C

Night low 5°C

Rainfall Mostly dry

Daylight 13 h 49 m of light

Regional 2001-2020 average for April — NASA POWER, grid elevation 133 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a fast & flat course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert

👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for 50 km of trail with 500 m of ascent.

Trail Running Shoes50 km of trail — cushioning that is still there in the last quarter.
Race Nutrition50 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 50 km, without the bounce.
GPS WatchesBattery life first — a 50 km day outlasts most full-GPS modes.

Adidas

Terrex Speed Ultra

★★★★★ 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