Harter Knochen Ultra

Race completed

50 km Distance

2,500 m Climbing

6.3 Grit · Hardcore

48.9409° N, 8.4076° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 50 m / km Mountain. Significant climbing. Steep sections will require power hiking.

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 1034 races of the same distance. Cut-off calculator →

Field size ~15 Tiny. You will run alone for most of it.

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, May

Daytime high 21°C

Night low 9°C

Rainfall Mostly dry

Daylight 15 h 17 m of light

Regional 2001-2020 average for May — NASA POWER, grid elevation 202 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2026	50km	15	Patrick Obert · 04:47:00	Theresa Münchgesang · 05:47:00
2025	50km	14	Michael Reis · 05:13:00	Nicole Kolper · 05:51:00

The field grew 7% between 2025 (14) and 2026 (15). 7% of the 2026 field were women.

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.

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 50 km of trail with 2,500 m of ascent.

Trail Running Shoes 50 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 2,500 m of ascent to walk up.
GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.

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

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

Spring Energy