Saksvik, Norway · Saturday, October 10, 2026

Fixed Distance 50 mi

Krukes Ultra-Trail Challenge 12 laps

10 days to go

80 km Distance

4,424 m Climbing

10.0 Grit · Elite / extreme

63.4346° N, 10.6040° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 55 m / km Mountain. Significant climbing. Steep sections will require power hiking.

Time limit 15 hours 11:15 min/km average. Generous. Walkable throughout for most of the field. About average for a 50 mi. Measured against 471 races of the same distance. Cut-off calculator →

Field size ~4 Tiny. You will run alone for most of it.

DUV results for the 2025 edition (50mi) — 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 7°C

Night low 2°C

Rainfall Showers likely

Daylight 10 h 33 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 263 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50mi	4	Ronny Støbakk · 13:09:45	—

0% of the 2025 field were women.

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

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a mountain course. Poles are highly recommended for the sustained climbs.

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 80 km of trail with 4,424 m of ascent.

Trail Running Shoes 55 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 80 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 4,424 m of ascent to walk up.
Headlamps A 15 h limit puts you out there after dark.

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

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Skratch Labs

Sport Hydration Mix

Clean electrolyte drink mix with real fruit flavor. Low sugar.

$20 ★★★★★ 4.5

Salomon

ADV Skin 12

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

$180 ★★★★★ 4.8

Black Diamond

Distance FLZ

Lightweight folding trekking poles with FlickLock Z adjustment. 340g per pole.

$170 ★★★★★ 4.7

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7

All gear guides →

Overview

The Krukes Ultra-Trail Challenge 12 laps, organised by KrUltra, is an 80 km trail race in Saksvik, Norway, taking place in October. With 4424 meters of elevation gain over 80 km, it climbs 55.3 meters per kilometer, making it a demanding course.

The race has a time limit of 15 hours, equating to a cutoff pace of 11.3 minutes per kilometer. This cutoff is tighter than 45% of its 458 peer 50-mile races. The course consists of 12 loops, each 6.7 km long with 368.7 meters of elevation gain.

Having been run only 1 time in 2025, with 4 finishers, the Krukes Ultra-Trail Challenge 12 laps has a smaller field than 3% of its 654 peer 50-mile races.

Similar races

Other 50 mi trail ultras, closest in distance first.