Marathon, 42 km
Run around 6 lakes
How many lakes have you run around in your life? Many have run around one lake, but you can be one of us who has run around all 6. Along the course you will see lakes, beautiful houses and a lot of forest. Our marathon is mostly easy running, on small gravel roads through the forest, easy paths and only a few kilometers of asphalt. About 5 km is a real forest trail. There are plenty of hydration stations and the marathon course is excellent. If it gets hot, you can actually take a dip along the course at three places.
GPX file, marathon 2026 (compressed to .zip)
Link to Strava, marathon 2023
PDF with all distances 2026.
Video from runners testing the course on their own.
Please note that the course may be slightly longer than 42,2 km. Unlike races on asphalt, we cannot measure the length exactly, but it is usually between 42,3 and 42,4 km when we measure.
Ready to start?
All distances – marathon, half-mara, 10 km and 5 km has start and finish in Fjällnora by the lake Trehörningen, the same day. Mountain nora is located 20 minutes east of Uppsala, one hour north of Stockholm.
Start time: Marathon starts at 10:00, the other distances at 30 min intervals after that. If you have friends running other distances, they won't have to wait long.
Elevation difference: The course is flat (between 15 and 55 m above sea level) – but if you are tired, a 20-meter hill can be tough. And if you have only run city marathons, it may feel hilly.
Easy to find: All courses are well marked and easy to find. This does not prevent you from running wrong, especially if a group is running together and you think that “someone else” is in control. If you are unsure, you can always backtrack a couple of hundred meters until you see a course marking again. The only place where there is sparse between the tracks is at the northern end around Frötuna, but there it is easy to follow the gravel roads.
Course description
You start northwards on an easy, wide path after a short stretch on asphalt along Fjällnoravägen. Shortly afterwards you cross the road and enter the most technical part of the course, in the forest south of Lötsjön. It is a regular forest path, but there is always a risk of tripping on a root or stone. You get some beautiful views of the lake and soon you come to the Borgis hydration station – which is also a beach. If it is really hot you might want to take a quick dip!
The stretch along Lötsjön is beautiful. This is the only longer stretch with a forest trail, so take it easy!
After Länna you will enter deep into the forest and see, among other things, the small Ältsjön lake. A seventh “bonus lake”.
Be aware that you are crossing the railway after the forest on your way into the town of Länna. The trains do not go fast, but they are museum trains and steam locomotives that have a long braking distance. Never run in front of the train. You will also cross the main road, 282, so be careful.
After just under a km on asphalt (a sidewalk along 282) you run again onto a forest path, usually very easy running. Here you will see the small forest lake Ältsjön. The following stretch is a few kilometers of small forest roads. One or two crofts, a barn, otherwise dark forest or large clearings.
The stretch around Lake Funbosjön is quite long, but a nice run. You come out to a mixed agricultural landscape and on a couple of occasions see Lake Funbosjön beyond the meadows. Small cottages become larger and eventually you come to Frötuna farm, which still owns much of the land around it. There is a hydration station here to replenish your energy before an incredibly long avenue that leads to an asphalt road.
Along the asphalt road you will see a sign on the left, “Funboslätt”. You will now get another glimpse of Lake Funbosjön. A nice hydration station is located at the Grytbol cottage. Then we run on old village roads that have now been transformed into paths.
More open countryside and two kilometres of asphalt before you reach Funbo Church from the 1100th century. There are toilets here. You cross a two-hundred-year-old stone bridge and then take a small detour north past Hallkveds gård, a beautiful manor house from the 1700th century. After another km you cross 282, be careful – tired runners and fast cars are a bad combination!
Through the village of Källtorp and into the forest again, but only 700 m before you come back to TrehörningenThere is a hydration station and toilet.
Funbo church after about 25 km, WC and water station.
Frötuna farm is located at the northern end of Lake Funbosjön, at km 17. There is a hydration station here.
The following part is the same as for the half marathon:
Here you continue on small, forgotten gravel roads to the next hydration station, Häggdal.
Here (after about 35 km) you meet the 10 km course again, but soon you are in Skräddartorp where they turn off towards Fjällnora and you continue forward. Shortly afterwards you come to Norredatorp, a small farm owned by the students of Uppsala University. Here we have a hydration station with two toilets. You continue on a forest path along Norrsjön.
Now we are approaching the southernmost end of the course and now we are running in Knivsta municipality. After about 38 km, at the village of Eda you turn north on small gravel roads. The road back to Fjällnora goes on the east side of the lakes Norrsjön and Ramsen. The gravel road has a tough uphill slope before you reach the last hydration station, Röda stigen. Then a forest path for a few hundred meters and another couple of kilometers on gravel roads before you FINALLY arrive at Fjällnora again.
Marielund station. Behind the station there is a café. There are toilets here.
Be prepared for your GPS to read anywhere from 42,2 to 43 km before you arrive. We have designed the course so that no one can run shorter than 42.2 – regardless of which app you have or if you run the shortest route around the turns.
From Marielund it is easy asphalt approximately km 29-31. From now on the half marathon will follow the same route.
Choose race
From the short run on the forest paths along Lake Ramsen to the long, but varied roads and trails around all six lakes.
The times are adjusted so that you, your friends and family members can choose different distances and still run at the same time.
