25
runners
11
runs
Jogging routes in Fjellstulfjellet Naturreservat traverse a mountainous landscape characterized by forested slopes and varied terrain. The area features undulating sections, open spaces, smooth granite rock slabs, and old-growth spruce and pine forests. Small lakes are interspersed throughout the reserve, adding to the natural environment. This protected area offers a peaceful setting for running, free from motorized traffic.
Last updated: July 4, 2026
4
runners
6.67km
01:10
320m
320m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
3
runners
12.4km
01:36
380m
380m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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3
runners
4.06km
00:29
50m
50m
Easy run. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
5
runners
7.53km
00:56
150m
150m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3
runners
11.6km
01:16
180m
180m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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The running trails in Fjellstulfjellet Naturreservat offer a varied experience. You'll encounter hard-packed earth, some baked-in stone, and sections with technical rock and roots. The landscape features forested slopes, open spaces, smooth granite rock slabs (svaberg), and old-growth spruce and pine forests. The terrain is generally described as 'small and hilly' with diverse inclines and descents.
Yes, Fjellstulfjellet Naturreservat offers routes suitable for beginners. For instance, the Running loop from Tinfos I kraftverk is an easy 4.1 km (2.5 miles) trail with minimal elevation gain, making it very accessible for those new to trail running.
The reserve offers a range of difficulties. While some paths are mostly accessible, others require good fitness and sure-footedness due to technical sections and significant elevation changes. For example, the Saltkleiv – Ruggebergåsen loop from Jerpetjønn is a difficult 6.7 km route with over 300 meters of elevation gain, providing a more challenging experience.
Yes, a significant attraction within the reserve is Fjellstulvarden, which marks the highest point of the mountain area. A trip to Fjellstulvarden is rewarded with lovely views at the top. The trails leading to it are well-marked and maintained.
Convenient access to the trails is available with a large parking area and map information at Jerpetjønnhovet. This location is situated at the highest point of the E-134 road between Notodden and Kongsberg.
Yes, Fjellstulfjellet Naturreservat is accessible by public transport. Regular bus services connect Notodden and Kongsberg, passing directly by Jerpetjønnhovet, which is a key access point for many trails.
The reserve is ideal for running during the warmer months when trails are clear of snow and ice. The varied landscape and tranquil environment are particularly enjoyable from spring through autumn. Always check local conditions before heading out, especially during shoulder seasons.
Fjellstulfjellet Naturreservat is a protected natural area. While specific regulations for dogs should always be checked with local authorities, generally, dogs are permitted on trails but must be kept on a leash to protect wildlife and ensure a peaceful experience for all visitors.
Yes, there are several circular running routes. For example, the Rundetjern – Trehyrna loop from Max Camping is a challenging 12.4 km circular route, and the Blekningstjønn – Tinnemyr loop from Notodden offers a moderate 11.6 km option.
Running in Fjellstulfjellet Naturreservat offers a unique blend of challenging and accessible trails through a pristine natural environment. The absence of motorized traffic ensures a peaceful and immersive experience amidst stunning landscapes, old-growth forests, small lakes, and diverse terrain, making it an ideal destination for a rewarding outdoor workout.
Komoot features over 10 running routes in Fjellstulfjellet Naturreservat, catering to various fitness levels. These include easy loops, moderate trails, and more difficult paths with significant elevation changes.
Yes, the reserve is interspersed with small lakes, and many running routes will take you past these tranquil water features. For instance, the Tinnemyr loop from Tinfos I kraftverk is a moderate 7.9 km route that leads through forested areas and past small lakes.


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