4.8
(1554)
7,380
hikers
154
hikes
Hiking around Hammersø, located on Bornholm, Denmark, features a landscape shaped by granite bedrock and coastal cliffs. The region offers varied terrains, including rocky heath, mixed forests, and lush valleys, with Hammersø itself being Denmark's only mountain lake. Hikers encounter diverse natural features such as the Hammerknuden headland, Opalsøen (Opal Lake), and Krystalsøen, often formed from former granite quarries. The area provides a mix of rugged coastal paths and serene lake environments.
Last updated: May 14, 2026
4.9
(10)
34
hikers
Moderate hike. Great for any fitness level. Mostly accessible paths. Sure-footedness required.
4.5
(6)
40
hikers
3.29km
00:52
30m
30m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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4.8
(5)
30
hikers
Moderate hike. Great for any fitness level. Mostly accessible paths. Sure-footedness required.
5.0
(4)
20
hikers
9.38km
02:30
100m
100m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.7
(3)
23
hikers
2.30km
00:37
20m
20m
Moderate hike. Great for any fitness level. Mostly accessible paths. Sure-footedness required.
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Great photo opportunity, the lake and the rocks in the background.
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Beautiful view of the lake. You should be free from vertigo, though, as there are no railings here!
1
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Fantastic view...not worth the price.
1
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There's a small snack bar here, including delicious soft ice cream.
1
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The rest area is located directly on the lake, with the best view of the rock faces.
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While exploring the north coast, you should definitely take a moment to visit Allinge Harbour. This authentic Bornholm port was blasted directly out of the rocky shoreline to accommodate larger ships. Today, it's a bustling hub for the town, surrounded by eateries, shops, and a vibrant seaside atmosphere. Whether you're watching the fishing boats or just enjoying the amenities, it's a perfect spot to spend some time.
2
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beautiful forest path
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The area around Hammersø is characterized by a unique and varied landscape. You'll encounter dramatic granite bedrock and coastal cliffs, especially on the Hammerknuden headland. Trails often feature rocky heath with heather and juniper, mixed forests, and lush valleys. Many routes involve hilly and rocky sections, requiring good fitness and sure-footedness.
Yes, while many trails are moderate, there are easier options. For example, the Hammerhavn Harbor – Hammersø Lake loop from Langebjerg is an easy 4.4 km hike that offers a more gentle experience around the lake and harbor area.
Hikers can explore several significant features. The area boasts the dramatic Hammerknuden headland with its panoramic Baltic Sea views, and fascinating rock formations like 'Camel and Lion's Head'. You'll also find other lakes formed from former granite quarries, such as Opalsøen (Opal Lake) and Krystalsøen. The historic Hammershus Castle Ruins and the Hammer Fyr lighthouse are also prominent sights.
Generally, dogs are welcome on trails in Denmark, but it's important to keep them on a leash, especially in nature reserves and areas with livestock or wildlife. Always check local signage for specific restrictions on individual trails or protected areas around Hammersø to ensure a pleasant experience for everyone.
Yes, many of the trails around Hammersø are designed as loops, allowing you to start and end at the same point. A popular example is the Hammeren Coastal Landscape – View of the Quarry and Lakes loop from Allinge-Sandvig, which is a moderate 6.1 km route offering coastal views and insights into former quarry areas.
The area is beautiful year-round, but the best time for hiking is typically from spring through autumn (April to October). During these months, the weather is generally milder, and the natural scenery, including heather and juniper, is vibrant. Summer offers longer daylight hours, while spring and autumn provide cooler temperatures ideal for longer hikes.
Yes, there are routes suitable for families, though some trails can be hilly and rocky. Shorter, less strenuous loops are often ideal. For example, the Zipline at Opalsee – Hammersø Lake loop from Allinge-Sandvig is a moderate 2.3 km route that passes by Opalsøen, known for its clear waters and summer activities like zip-lining, which can be an exciting addition for children.
There are over 150 hiking routes available in the Hammersø region, catering to various skill levels. This includes a good mix of easy, moderate, and some more challenging trails, ensuring there's something for every hiker.
The area is highly rated by the komoot community, with an average score of 4.8 stars from over 1500 reviews. Hikers frequently praise the dramatic granite landscapes, the serene beauty of Hammersø itself, and the historical sites like Hammershus. The diverse terrain, from coastal paths to forest trails, is also a highlight for many.
Yes, public transport is available on Bornholm. Buses connect various towns and attractions, including areas near Hammersø. You can often find bus stops in towns like Allinge-Sandvig, which serve as good starting points for many trails. It's advisable to check local bus schedules for the most up-to-date information on routes and timings.
Yes, Opalsøen (Opal Lake), formed from a former granite quarry, is known for its crystal-clear waters and is a popular spot for swimming in the summer. Some well-equipped shelter spots around Hammersø also offer opportunities for swimming in the lake, providing a refreshing break during your hike.
Parking is generally available at key access points and popular trailheads around Hammersø and the Hammerknuden area. Specific parking areas can be found near attractions like Hammershus Castle Ruins, Hammerhavn, and in towns like Allinge-Sandvig, which serve as common starting points for many hikes.


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