Stockholm Trail Run 50K is a 50km ultra marathon in Stockholm, Sweden. Distance: 50km. Elevation: 700m D+. Difficulty: accessible (Challenge Rating 18/100). DNF rate: 5%. Time limit: 9h. Surface: trail. Established 2016.
Stockholm Trail Run 50K
Stockholm, Stockholm, Sweden
"50km through Stockholm's ancient forests. Pine trails, pristine lakes, and the perfect Scandinavian first ultra."
A flat, scenic 50K through old-growth forest just outside Stockholm — Scandinavia's most accessible first ultra.
The Course
A surprisingly scenic loop through the forests and nature reserves on the outskirts of Stockholm. The course runs on soft forest trails, along lakes, and through the Tyresta National Park — one of the largest old-growth forests near any European capital.
rolling
loop
5
Runner Experience
Standard aid station support with food, drinks, and basic medical assistance at regular intervals.
Warm, inclusive finish line with a strong community feel. Runners celebrate together regardless of finish time.
Race Day Weather
14°C
8° – 20°
65%
30%
Swedish early autumn — pleasant temperatures, cool mornings. The forest is at its most colourful.
Stats & Records
2016
400
06:30:00
Entry
SEK 900
February
months
Lore & Trivia
Styr 50K is a no-frills Scandinavian trail race through the forests and hills of central Sweden. The name means "strength" in old Swedish, and the race embodies the Swedish running ethos: quiet determination, minimal fuss, and deep respect for nature. The course follows paths through ancient forest where the only sounds are birdsong and your own breathing. It's the kind of race that doesn't make international headlines but captures everything that makes Scandinavian trail running special.
- ▸ Tyresta National Park contains 400-year-old pine trees — some of the oldest in Scandinavia.
- ▸ The race proves you don't need mountains to have a fantastic trail ultra — Stockholm's forests are stunning.
- ▸ Moose, deer, and foxes inhabit the forests along the course.
- ▸ The flat, well-marked course makes this an ideal first ultra for Scandinavian runners.
- ▸ Established in 2016.
Styr means strength in old Swedish. The forest gives it. The distance takes it away. That's the deal.
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Frequently Asked Questions
How long is Stockholm Trail Run 50K? +
Stockholm Trail Run 50K is a 50km (50km) ultra marathon with 700m of elevation gain. The course is loop on trail terrain.
How hard is Stockholm Trail Run 50K? +
Stockholm Trail Run 50K is rated accessible with a Challenge Rating of 18/100 (Approachable). The DNF rate is 5%. Runners have 9 hours to finish.
What is the weather like at Stockholm Trail Run 50K? +
Average temperature is 14°C (range 8°C to 20°C) with 65% humidity and a 30% chance of rain. Swedish early autumn — pleasant temperatures, cool mornings. The forest is at its most colourful.
Are crew and pacers allowed at Stockholm Trail Run 50K? +
No crew access is permitted. Pacers are not allowed.
What is the average finish time for Stockholm Trail Run 50K? +
The average finish time is 06:30:00. About 400 runners finish each year. The DNF rate is 5%.
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