La Diagonale des Yvelines 103km

Race completed

103 km Distance

1,200 m Climbing

7.0 Grit · Hardcore

48.9445° N, 1.7151° E© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 12 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.

Time limit 16 hours 9:19 min/km average. Comfortable. Room to walk the climbs and stop at aid. About average for a 100K. Measured against 208 races of the same distance. Cut-off calculator →

Field size ~144 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2026 edition (103km) — 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 15°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 116 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

🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

Gear for this race

Chosen for 103 km of trail with 1,200 m of ascent.

Trail Running Shoes103 km of trail — cushioning that is still there in the last quarter.
Race NutritionPast 103 km the palate quits before the legs do — carry more than one flavour.
Hydration VestsFlask capacity for 103 km, without the bounce.
HeadlampsA 16 h limit puts you out there after dark.
AccessoriesChafe and blisters end more 103 km races than fitness does.

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Asics