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Norway

Alnsjøen

The best walks and hikes around Alnsjøen

4.5

(1456)

13,514

hikers

507

hikes

Hiking around Alnsjøen offers diverse trails within the Lillomarka forest, part of the Oslomarka system in northern Oslo. The area is centered around Alnsjøen lake, which functions as a minor water reservoir. The terrain features dense woodlands and varied elevation, providing a classic forest hiking experience. Traces of 18th-century copper mining activities are also present in the landscape.

Best hiking trails around Alnsjøen

  • The most popular hiking route is Hike around Alunsjøen, a 4.0 miles (6.5 km) trail that…

Last updated: April 28, 2026

4.0

(2)

6

hikers

#1.

Hike around Alunsjøen

6.54km

01:49

120m

120m

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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Easy

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate

Moderate hike. Great for any fitness level. Mostly accessible paths. Sure-footedness required.

Moderate

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Popular around Alnsjøen

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Tips from the Community

Totosupertramp (Thomas Boury)
April 17, 2025, Nice single track

A soft, root-laced trail winding through tall pine woods, perfect for flowy runs, quiet hikes, or just soaking in the forest stillness.

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From the trail we benefit from a nice view over the Alungsjøen lake.

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This small dam overflow from the Alundsjøen lake creates a surprising and photogenic contrast in the landscape.

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Nice little stream running in the middle of the forest.

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Frequently Asked Questions

How many hiking trails are available around Alnsjøen?

There are over 500 hiking trails around Alnsjøen, offering a wide variety of options. Approximately half of these are rated as easy, with another significant portion being moderate, and a smaller number of more difficult routes for experienced hikers.

What kind of terrain can I expect when hiking around Alnsjøen?

The terrain around Alnsjøen is characterized by dense woodlands within the Lillomarka forest, part of the larger Oslomarka system. You'll find varied elevation, offering a classic forest hiking experience with paths winding through trees and occasional views of the lake. Some areas also bear traces of 18th-century copper mining activities.

Are there any easy loop trails suitable for beginners or families?

Yes, there are many easy loop trails. A popular option is the Hike around Alunsjøen, which is an easy 6.5 km route that circles the lake. This trail is generally accessible and takes about 1 hour 49 minutes to complete, making it ideal for a relaxed outing.

What are the best viewpoints or natural features to look out for?

The lake itself, Alnsjøen, is a prominent natural attraction, serving as a forest lake. Hikers often enjoy views of the lake through the dense Lillomarka forest. While there aren't specific named viewpoints in the immediate vicinity, routes like the View of the Lake in Nordmarka loop from Grorud offer scenic perspectives of the water and surrounding woodlands.

Is Alnsjøen suitable for family-friendly hikes?

Absolutely. Alnsjøen offers many family-friendly hiking opportunities, especially the easier routes that circle the lake. The generally accessible trails and the natural setting of the Lillomarka forest provide a pleasant environment for families to explore together. Remember to check the specific trail difficulty and length to match your family's capabilities.

Can I bring my dog on the hiking trails around Alnsjøen?

Yes, the Lillomarka area, including Alnsjøen, is generally dog-friendly. Norway's 'allemannsretten' (right to roam) allows access to wilderness areas. However, it's always important to keep your dog on a leash, especially during nesting seasons or when near wildlife, and to clean up after them to preserve the natural environment for everyone.

What is the best time of year to hike around Alnsjøen?

Alnsjøen is beautiful year-round. Spring and summer offer lush greenery and pleasant temperatures, ideal for hiking. Autumn brings vibrant fall colors to the forest. In winter, the area transforms, with gates opened to allow access for prepared ski tracks across the frozen lake, offering a unique winter hiking experience. Always check local weather conditions before heading out.

Are there any restrictions on activities like swimming or fishing in Alnsjøen?

Yes, due to Alnsjøen's function as an important minor water reservoir for the city of Oslo, activities like swimming and fishing are generally restricted to prevent contamination. It's best to respect these regulations to protect the city's drinking water source.

How can I get to the Alnsjøen hiking trails using public transport?

Alnsjøen is accessible via public transport from Oslo. Many routes, such as the Bispedalskollen – Sportstuen View loop from Grorud and View of the Lake in Nordmarka loop from Grorud, start from Grorud, which is well-connected by metro and bus services. Check local transport schedules for the most up-to-date information on reaching trailheads.

Is there parking available near the Alnsjøen hiking areas?

Yes, there are parking options available near various trailheads accessing the Alnsjøen area. For example, routes starting from Grorud or Kalbakken, like the Picnic Area with Grill loop from Kalbakken, typically have designated parking facilities nearby. It's advisable to check specific trailhead information for parking availability.

What do other hikers enjoy most about hiking in Alnsjøen?

The Alnsjøen area is highly rated by the komoot community, with an average score of 4.6 stars from over 1,400 reviews. Hikers often praise the quiet woodlands, the diverse network of trails suitable for various fitness levels, and the serene beauty of the lake itself. Many appreciate the classic forest hiking experience within easy reach of Oslo.

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