STHLM Trail Marathon

A warm welcome to the second edition of STHLM TRAIL MARATHON All races take place on a very beautiful, approximately 15 km long course. Each lap will offer around 500 meters of elevation gain. Expect beautiful views and a tough run, mostly in hilly terrain, mostly on trails, sometimes off-trail but also on a couple of gentler stretches where you can stretch out and run for a few hundred meters.

New for 2026 • Be at the starting line already in April! This time we’re kicking off in early spring, so mark April 18 in your calendar now. • Kids Trail, a free race for our younger runners (born in 2014 or later). • Hjärnloppet, a virtual race that lasts 18 days where the entire registration fee goes to Hjärnfonden and vital epilepsy research. • Course trial runs. On two occasions we will run through the first and second parts of the course. • Virtual training sessions in the Heyey app that ensure you stay in shape all the way to the start line in April.

What is not new for 2026 • The course, a tough and very beautiful course in the surroundings around Flatensjön. • Sprint and Ultra, two trail races that challenge you a little extra. • Grit, the ultimate test that we don’t think anyone can complete. If you prove us wrong, you’ll win both honor and fame and also some prize money.

All info på arrangörshemsidan