Isenburg, Germany · Saturday, September 26, 2026
Fixed Distance 50 mi
Der Ruf der alten Mauern - 90km
Race completed
90 km Distance
2,400 m Climbing
8.1 Grit · Hardcore
What the course asks
Climbing rate 27 m / km
Rolling. Moderate undulations. Requires consistent effort across varying grades.
Typical conditions, September
Daytime high 20°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 294 m. Not a forecast.
The Aid Station
Course-specific beta from the community
This is a rolling course. Expect fast, runnable sections where rhythm is key.
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 90 km of trail with 2,400 m of ascent.
- Trail Running Shoes 27 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition 90 km of self-supported fuelling between aid stations.
- Hydration Vests Pole attachment and chest-strap stability on steep ground.
- Trekking Poles 2,400 m of ascent to walk up.
- Headlamps 90 km almost certainly means running into the night.
Similar races
Other 50 mi trail ultras, closest in distance first.