Stockholm, Sweden · Saturday, October 10, 2026

Fixed Distance 50K

Sörmland Ultra Marathon

24 days to go

51 km Distance

not publishedn/a Climbing

2.6 est Grit · Entry level

Calculated from 51 km alone — the organiser has not published an elevation profile. Read 2.6 as a floor, not a verdict.

59.3294° N, 18.0687° E© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 8 hours 9:25 min/km average. Comfortable. Room to walk the climbs and stop at aid. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Tighter than 89% of 50K races. Measured against 1007 races of the same distance. Cut-off calculator →

Field size ~126 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, October

Daytime high 10°C

Night low 4°C

Rainfall Mostly dry

Daylight 10 h 47 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 27 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 51 km of trail.

Trail Running Shoes51 km of trail — cushioning that is still there in the last quarter.
Race Nutrition51 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 51 km, without the bounce.
GPS WatchesBattery life first — a 51 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

Terrex Speed Ultra

★★★★★ 4.5

Maurten

Gel 100

Hydrogel technology for 25g carbs per gel with minimal GI distress.

$3.5 ★★★★★ 4.7

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

COROS

APEX 2 Pro

GPS running watch with 75-hour GPS battery, topo maps, and training metrics.

$500 ★★★★★ 4.7

All gear guides →

Course Notes

The race is an all-terrain footrace through the south part of Stockholm. The race follows primary the hiking route Sörmlandsleden. The race course mainly trail, some gravel roads and some km of tarmac.

Similar races

Other 50K trail ultras, closest in distance first.