Gjerdrum, Norway · Saturday, September 26, 2026

Fixed Distance 50K

Oslo Trail Challenge 55km

10 days to go

55 km Distance

not publishedn/a Climbing

2.8 est Grit · Entry level

Calculated from 55 km alone — the organiser has not published an elevation profile. Read 2.8 as a floor, not a verdict.

60.0788° N, 11.0206° E© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 12 hours 13:05 min/km average. Generous. Walkable throughout for most of the field. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. More forgiving than 61% of 50K races. Measured against 1007 races of the same distance. Cut-off calculator →

Field size ~34 Small. Long stretches with nobody in sight.

DUV results for the 2024 edition (55km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, September

Daytime high 15°C

Night low 7°C

Rainfall Showers likely

Daylight 12 h 01 m of light

Regional 2001-2020 average for September — NASA POWER, grid elevation 210 m. Not a forecast.

The Aid Station

Course-specific beta from the community

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

Gear for this race

Chosen for 55 km of trail.

Trail Running Shoes55 km of trail — cushioning that is still there in the last quarter.
Race Nutrition55 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 55 km, without the bounce.
HeadlampsA 12 h limit puts you out there after dark.
GPS WatchesBattery life first — a 55 km day outlasts most full-GPS modes.

Brooks

Catamount 3

RunRepeat found the Brooks Catamount 3 to have a cozier upper that enhances the overall fit, though breathability and durability could be better. iRunFar noted…

★★★★★ 4.5

Adidas