Fjällmaraton 100K.
The Fjällmaraton 100K runs from Fångåmon across a chain of fells to Ottsjö, dropping back almost to valley level three times along the way. What decides your day is how well you look after yourself between the seven aid points, and whether anything is left for the last long climb after nearly 80 kilometres.
Fjällmaraton 100K 2027: Course, Elevation & Route Profile
The first 20-odd kilometres via Nulltjärn to Vålådalen are the quietest of the day, staying broadly between 500 and 600 metres above sea level. Right after the Vålådalen aid point comes the biggest climb of the race, around 500 metres of gain in just under four and a half kilometres. The course then stays high, above 1,000 metres, until it drops almost 400 metres between km 33 and km 36 towards Nordbottnen.
From there the pattern repeats: a climb of about 370 metres, then down to Ottsjö, where at km 51.5 you pass through the finish village with only half the work done. Four shorter climbs lift you back to around 900 metres before the route falls to the valley once more. Beyond Edsåsdalen, from km 78.6, the last big ascent gains just over 450 metres past Skavhugget. After that it is downhill to the finish, apart from one small roller beyond Ytterstvallen.
The organiser calls the route over Ottfjället, Hållfjället, Grofjället and Välliste a runnable trail, but between aid points you are on your own. It quotes 3,300 metres of ascent, while measuring the line gives around 2,600. When planning legs and food, lean towards the larger figure.
| Start | Length | Ø | Max. | Gain | Cat. |
|---|---|---|---|---|---|
| km 22 | 4.5 km | 11.3 % | 25.1 % | +507 m | Cat. 2 |
| km 38.4 | 4.5 km | 8.1 % | 17.3 % | +366 m | Cat. 2 |
| km 51.4 | 1.5 km | 7.5 % | 14.1 % | +108 m | Cat. 4 |
| km 55 | 1.3 km | 6.3 % | 9.9 % | +84 m | Cat. 4 |
| km 60.5 | 2.3 km | 8.3 % | 17.7 % | +190 m | Cat. 3 |
| km 65.2 | 3.1 km | 7.4 % | 12.6 % | +230 m | Cat. 3 |
| km 78.6 | 5.4 km | 8.4 % | 18.4 % | +456 m | Cat. 2 |
| km 93.7 | 1.7 km | 4.3 % | 7 % | +71 m | — |
Climb categories follow the road-cycling convention and rate the terrain itself (length and gradient) regardless of sport: Cat. 4 marks the easiest rated climbs, Cat. 1 the hardest, and HC (hors catégorie, “beyond categorization”) is reserved for the most brutal ascents. Short climbs below the Cat. 4 threshold stay unrated.
How to pace Fjällmaraton 100K.
Start under control
The flat kilometres to Vålådalen cost nothing as long as you do not run them fast. That is the temptation: push because the trail allows it and you reach km 22 over-revved, facing ramps of up to 25 percent. Arrive at the foot of the climb feeling underworked and hike the steep parts. The next 16 kilometres to Nordbottnen have no aid, so fill everything at Vålådalen.
Hold your rhythm
The descent off the first high section is the second test. Brake your way stiffly down those 400 metres and your quads pay for it over the 60 kilometres that follow. Ottsjö is then a mental trap: you are standing in the finish village with nearly the whole second half still to run. Keep the stop short and count from here only as far as Tobaksdalen, the next aid point.
Spend what is left
The race is decided from Edsåsdalen on. The last long climb arrives when your legs already carry three descents to the valley. Skavhugget sits in the middle of it, only five kilometres after Edsåsdalen, so eat at both. If you can still run at the top, the way down to the finish gains you plenty of places.
Training plan for Fjällmaraton 100K: 12-week build
Build the base
Age-group athletes spend roughly 12 to 18 hours on the Fjällmaraton 100K. That makes it a steady aerobic effort broken up by walking on the climbs, since almost a quarter of the course is steep, up or down. Peak output counts for little here; what matters is how little each climb takes out of you.
Train race pace
The course saves its last big test for the end, so your long sessions should too. Plan days of six to eight hours with the longest climb in the final hour, and add back-to-back long runs on consecutive days. For the ramps, practise brisk hiking on steep slopes, on tired legs as well as fresh ones.
Rehearse the course
Three descents to the valley, one of them almost 400 metres in about three kilometres, call for durable quads. Run steep downhills regularly, and do it at the end of long sessions rather than fresh. Strength work for the front of the thighs supports that but does not replace it.
Arrive fresh
Because you are self-sufficient between aid points, a full race pack belongs in every long session: practise carrying drink and food for 16 kilometres of terrain and actually getting it down. The race starts early in the morning, so try one long run with the same breakfast time. An early August date puts your longest sessions in June and July.
Courses
Download the Fjällmaraton 100K course as a GPX file for your watch or bike computer.
Let YOUB adapt your plan for Fjällmaraton 100K dynamically
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Everything about Fjällmaraton 100K.
How long is Fjällmaraton 100K?
Fjällmaraton 100K is 100 km long. That distance shapes how much aerobic endurance, pace durability, and race-specific work belong in the training plan.
How much elevation gain does Fjällmaraton 100K have?
Fjällmaraton 100K has around 2,595 m of elevation gain over 100 km. That affects pacing, muscular load, and preparation for late-race sections.
What is the route profile of Fjällmaraton 100K?
Fjällmaraton 100K is classified as Mountainous, averaging 26.1 vertical metres per kilometre. 20% of the route is flat, 30% climbs moderately (2 to 6%) and 11% is steeper than 6%.
What climbs does Fjällmaraton 100K have?
The hardest climb of Fjällmaraton 100K starts at kilometre 22, runs for 4.5 km at an average of 11.3% and gains 507 metres. Cycling-convention rating: Cat. 2. 8 climbs are mapped in total.
Is Fjällmaraton 100K a loop course?
No, Fjällmaraton 100K is a point-to-point course: start and finish are in different places.
Is there a GPX file for the Fjällmaraton 100K course?
Yes. The Fjällmaraton 100K course is on this page as a free GPX download — ready to import into Garmin, Wahoo, Komoot, Strava or any other app that reads GPX.
How should I prepare for Fjällmaraton 100K?
Preparation for Fjällmaraton 100K should account for 100 km, 2,595 m of elevation gain, current training load, and available training time. An adaptive plan helps place key sessions without ignoring recovery and real life.
What pacing strategy works for Fjällmaraton 100K?
The pacing strategy for Fjällmaraton 100K should reflect 100 km, 2,595 m of elevation gain, and your current fitness. Start controlled and keep margin for sections where the profile or fatigue makes target pace harder.
When does Fjällmaraton 100K take place?
Fjällmaraton 100K takes place on August 5, 2027.
Where does Fjällmaraton 100K take place?
Fjällmaraton 100K takes place in Ottsjö, Sweden.
How do I register for Fjällmaraton 100K?
Registration runs through the organiser: fjallmaraton.se. YOUB shows you the course, elevation profile and training plan for your preparation.
