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
What the course asks
Climbing rate 38 m / km
Rolling. Moderate undulations. Requires consistent effort across varying grades.
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 46 km of trail with 1,743 m of ascent.
- Trail Running Shoes38 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition46 km of self-supported fuelling between aid stations.
- Hydration VestsPole attachment and chest-strap stability on steep ground.
- Trekking Poles1,743 m of ascent to walk up.
- GPS WatchesBattery life first — a 46 km day outlasts most full-GPS modes.
Similar races
Other 50K trail ultras, closest in distance first.