Breuil-Bois-Robert, France · Saturday, April 18, 2026

Fixed Distance 100K

La Diagonale des Yvelines 103km

Race completed
103 km Distance
1,200 m Climbing
7.0 Grit · Hardcore
Register with organiserRegister ↗ Add to calendar
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 214 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.

Results history

Year Race Finishers Men's winner Women's winner
2026 103km 144 Xavier Partier · 08:33:24 Marie-Helene Schlosser · 11:11:52
2025 103km 169 Luc Gential · 08:44:15 Marie-Helene Schlosser · 11:11:24
2024 100km 151 Luc Gential · 09:02:08 Lola Robin · 11:55:21
2023 100km 103 Luc Gential · 07:44:59 Elodie Guegan · 10:03:23
2022 100km 55 Damien Cochet · 08:49:13 Marie-Helene Schlosser · 10:47:14
2021 84km 98 Alexandre Boucheix · 06:23:41 Claudine Le Maguer · 09:58:21
2019 90km 45 Gilles Klipfel · 07:50:35 Josefa Matondzi · 10:52:00

The field shrank 15% between 2025 (169) and 2026 (144). 13% of the 2026 field were women.

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.

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 Shoes 103 km of trail — cushioning that is still there in the last quarter.
  • Race Nutrition Past 103 km the palate quits before the legs do — carry more than one flavour.
  • Hydration Vests Flask capacity for 103 km, without the bounce.
  • Headlamps A 16 h limit puts you out there after dark.
  • Accessories Chafe 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

Trabuco Max 3

★★★★★ 4.6

Skratch Labs

Sport Hydration Mix

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

$20 ★★★★★ 4.5

Nathan

VaporKrar 12L

12L race vest co-designed with ultra champion Rob Krar, with insulated bladder pocket.

$170 ★★★★★ 4.6

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7

Buff

CoolNet UV+ Multifunctional

UPF 50+ neck gaiter with cooling technology. Desert and sun essential.

$25 ★★★★★ 4.5
All gear guides →

Overview

La Diagonale des Yvelines 103km, a trail race organised by AAA Aventure, offers 1200m of elevation gain over 103km, averaging 11.7m of climb per kilometre. This makes it a hillier 100k race than 82% of its peers. The 16-hour time limit translates to a 9.3 minutes per kilometre cutoff pace, which is tighter than 62% of 100k races.

With 144 finishers in its latest edition, this race has a larger field than 82% of 100k races. The entry fee ranges between 80€ and 90€. The event takes place in Breuil-Bois-Robert, France.

Similar races

Other 100K trail ultras, closest in distance first.