Lhuis, France · Saturday, May 9, 2026

Fixed Distance 50 mi

Trail So Bugey - Lintégrale So Bugey

Race completed

72 km Distance

3,200 m Climbing

8.4 Grit · Hardcore

45.7449° N, 5.5355° E© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 44 m / km Mountain. Significant climbing. Steep sections will require power hiking.

Field size ~70 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2026 edition (72km) — 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 18°C

Night low 8°C

Rainfall Showers likely

Daylight 14 h 38 m of light

Regional 2001-2020 average for May — NASA POWER, grid elevation 606 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a mountain course. Poles are highly recommended for the sustained climbs.

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 72 km of trail with 3,200 m of ascent.

Trail Running Shoes44 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition72 km of self-supported fuelling between aid stations.
Hydration VestsPole attachment and chest-strap stability on steep ground.
Trekking Poles3,200 m of ascent to walk up.
GPS WatchesBattery life first — a 72 km day outlasts most full-GPS modes.

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

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

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

LEKI

Ultratrail FX.One

Ultra-light carbon folding poles (135g each) designed for mountain ultra racing.

$200 ★★★★★ 4.6

COROS

APEX 2 Pro

GPS running watch with 75-hour GPS battery, topo maps, and training metrics.

$500 ★★★★★ 4.7

All gear guides →

Course Notes

un tracé constitué de 3 boucles différentes, qui consistera à parcourir les 3 autres formats de course dans l'ordre suivant : 22km, 39km puis 11km. Vous passerez donc 3 fois sur la ligne d'arrivée.

Similar races

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