Flatenbadet, Stockholm, Sweden · Saturday, April 18, 2026

Fixed Distance 50K

Sthlml Trail Marathon - 45km

Race completed
45.6 km Distance
1,743 m Climbing
4.9 Grit · Challenging
59.3294° N, 18.0687° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 38 m / km Rolling. Moderate undulations. Requires consistent effort across varying grades.

Typical conditions, April

Daytime high 9°C
Night low 1°C
Rainfall Mostly dry
Daylight 14 h 40 m of light

Regional 2001-2020 average for April — NASA POWER, grid elevation 27 m. Not a forecast.

Course notes

  • terrain This is a rolling course. Expect fast, runnable sections where rhythm is key.
  • gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.

Gear for this race

Chosen for 46 km of trail with 1,743 m of ascent.

All gear guides →

Similar races

Other 50K trail ultras, closest in distance first.