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Bike touring routes & trails
Denmark
Southern Denmark
Sønderborg

Alssund Loop Trail

Moderate

4.5

(26)

65

riders

Alssund Loop Trail

03:45

63.7km

360m

Cycling

Cycle the moderate 39.6-mile Alssund Rundt route, exploring coastal views and historical sites around Sønderborg and Als.

Last updated: February 26, 2026

This route includes a ferry crossing

Tips

Includes a ferry crossing

Check ferry timetable.

After 16.9 km for 1.73 km

Waypoints

A

Start point

Parking

Get Directions

1

307 m

Sønderborg Harbor

Highlight • Settlement

Great city on the Baltic Sea with a beautiful harbor where you can comfortably watch the hustle and bustle on the water. Since Germany is not far away, you will …

Translated by Google •

Tip by

2

17.3 km

Bicycle with rider 35 kroner. Card payment is welcome.

Translated by Google •

Tip by

3

26.3 km

Nordborg Castle

Highlight • Castle

The castle was rebuilt in 1910. A further education school was built in 1921 by the merchant Johan Hansen from Copenhagen. The castle is used as a boarding school and …

Translated by Google •

Tip by

B

63.7 km

End point

Parking

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Way Types & Surfaces

Way Types

42.9 km

14.1 km

4.08 km

1.65 km

868 m

< 100 m

Surfaces

55.1 km

4.82 km

2.35 km

1.39 km

< 100 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

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Weather

Powered by Foreca

Friday 3 July

19°C

13°C

49 %

Additional weather tips

Max wind speed: 21.0 km/h

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Frequently Asked Questions

Is the Alssund Rundt suitable for cyclists of all experience levels?

Yes, the Alssund Rundt is generally considered an accessible route suitable for both locals and tourists. While it features some inclines, with a maximum gradient of 12.3%, many sections have mostly paved surfaces, contributing to an easier riding experience. It's a moderate route, making it enjoyable for a wide range of cyclists.

What kind of terrain can I expect on the Alssund Rundt?

The route offers diverse terrain, reflecting the varied landscapes of the Sønderjylland region. You'll encounter moraine hills in the east and flatter areas in the west. Much of the route features paved surfaces, ensuring a comfortable ride, but be prepared for some inclines, including one with a 12.3% gradient.

What are the main highlights and points of interest along the Alssund Rundt?

The Alssund Rundt is rich in scenic and historical sights. Key highlights include the vibrant Sønderborg Harbor, the unique experience of crossing with the Bitten Clausen Ferry (Nordalsfærgen), and the historic Nordborg Castle. You'll also pass by Sandbjerg Slot, H.P. Hansens fødehjem, Mjels Sø, Science Park Universe, and Ketting, the oldest inhabited place on Als.

What is the best time of year to cycle the Alssund Rundt?

The Alssund Rundt is best enjoyed during the warmer months, typically from spring through early autumn. This period offers the most pleasant weather for cycling and allows you to fully appreciate the coastal views and natural beauty. While possible in winter, some amenities might be closed, and weather conditions can be more challenging.

Where can I park my car to start the Alssund Rundt?

While specific parking locations are not detailed, Sønderborg, as the starting point for many cycling tours in the area, offers various parking options. Look for public parking facilities within Sønderborg town center or near the harbor, which provide convenient access to the route.

Are there any public transport options to reach the Alssund Rundt starting point?

Yes, Sønderborg is well-connected by public transport. You can reach Sønderborg by train or bus, making it easy to access the starting point of the Alssund Rundt without a car. Check local transport schedules for the most up-to-date information on routes and timings.

Is the Alssund Rundt a loop trail?

Yes, the Alssund Rundt is designed as a circular route. It takes you around the Alssund and through significant parts of the island of Als, bringing you back to your starting point, making it ideal for a day trip.

Are dogs allowed on the Alssund Rundt cycling route?

Generally, dogs are permitted on cycling paths in Denmark, provided they are kept on a leash. However, specific rules may apply in certain protected natural areas or on ferries. Always ensure your dog is well-behaved and that you clean up after them to maintain a pleasant experience for everyone.

Do I need any permits or pay entrance fees to cycle the Alssund Rundt?

No, there are no specific permits or entrance fees required to cycle the Alssund Rundt. The route utilizes public roads and paths. However, if you visit specific attractions like Nordborg Castle or Science Park Universe, they may have their own admission fees.

Does the Alssund Rundt intersect with other well-known cycling paths?

Yes, the Alssund Rundt intersects with several other paths. Notably, it covers sections of the Østkystruten (25% of the route), Alsstien (12%), and Alssundstien (6%). You'll also find smaller overlaps with routes like Tour de France-ruten 3. etape and Nydamstien.

Are there places to eat or find accommodation along the Alssund Rundt?

Yes, as an iconic cycling route, the Alssund Rundt passes through various towns and villages where you can find cafes, restaurants, and accommodation options. Sønderborg itself offers a wide range of choices, and smaller towns along Als will have local eateries and guesthouses, especially during peak season.

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