Värmdö, Stockholm, Sweden · Saturday, September 19, 2026

Fixed Distance 50K

Värmdö Ultramarathon - VUM 50K

16 days to go

50 km Distance

700 m Climbing

3.6 Grit · Challenging

59.3409° N, 18.7985° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 14 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.

Time limit 13 hours 15:36 min/km average. Generous. Walkable throughout for most of the field. More forgiving than 80% of 50K races. Measured against 982 races of the same distance. Cut-off calculator →

Typical conditions, September

Daytime high 16°C

Night low 11°C

Rainfall Mostly dry

Daylight 12 h 37 m of light

Regional 2001-2020 average for September — NASA POWER, grid elevation 15 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a fast & flat course. Expect fast, runnable sections where rhythm is key.

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 700 m of ascent.

Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 50 km, without the bounce.
Headlamps A 13 h limit puts you out there after dark.
GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.