Trail du Jura Bernois - La Grandiose

Race completed

66 km Distance

3,129 m Climbing

8.0 Grit · Hardcore

47.2230° N, 7.1029° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 47 m / km Mountain. Significant climbing. Steep sections will require power hiking.

Time limit 13 hours 11:49 min/km average. Generous. Walkable throughout for most of the field. About average for a 50 mi. Measured against 471 races of the same distance. Cut-off calculator →

Field size ~77 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 edition (64km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, September

Daytime high 18°C

Night low 9°C

Rainfall Mostly dry

Daylight 12 h 02 m of light

Regional 2001-2020 average for September — NASA POWER, grid elevation 782 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	64km	77	Tristan Blanchard · 06:11:35	Hannah Kilgenstein · 07:11:58
2024	64km	62	Tristan Blanchard · 06:08:39	Sophie Andrey · 07:47:07
2023	64km	73	Tristan Blanchard · 05:57:10	Eleonore Paupe · 07:46:38
2022	64km	58	Tristan Blanchard · 06:25:47	Marie Myrtille Rossel · 08:54:34

The field grew 24% between 2024 (62) and 2025 (77). 27% of the 2025 field were women.

DUV results for the 2025 edition (64km) — 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 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 66 km of trail with 3,129 m of ascent.

Trail Running Shoes 47 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 66 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 3,129 m of ascent to walk up.
Headlamps A 13 h limit puts you out there after dark.

Adidas

Terrex Agravic Speed Ultra

RunRepeat found the Adidas Terrex Agravic Speed Ultra to be perfect for midfoot and forefoot strikers, while iRunFar noted that the shoe feels incredibly effici…

★★★★★ 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

Skratch Labs