Nature Reserve Guide
The district of Schleswig-Flensburg is home to 5 nature reserves, each offering distinct landscapes for outdoor recreation. These protected areas encompass a varied geography, from coastal salt marshes and dunes along the Baltic Sea to inland raised bogs, wetlands, and riverine forests. The primary purpose of these reserves is the conservation of vital habitats for numerous plant and animal species, particularly breeding and migratory birds. A network of designated trails provides opportunities for activities such as hiking, cycling, and running…
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Last updated: April 23, 2026

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Schleimündung is a nature reserve at the Schlei fjord's mouth, offering diverse coastal landscapes for hiking, cycling, jogging, and mountain biking routes.
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Mountain biking
Gravel riding
Road cycling
Cycling

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Natural Park Geltinger Birk offers diverse coastal features, wetlands, and grasslands for hiking, cycling, and jogging on over 50 routes.
Hiking
Running
Mountain biking
Road cycling
Cycling

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Naturschutzgebiet Fröslev-Jardelunder Moor is a cross-border high moor complex offering diverse routes for hiking, cycling, and mountain biking across its unique landscape.
Hiking
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Mountain biking
Road cycling
Cycling

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Alte Sorge-Schleife is a nature reserve in Schleswig-Holstein, Germany, offering cycling, hiking, and running routes through a flat wetland landscape with a meandering river.
Hiking
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Mountain biking
Road cycling
Cycling

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Naturschutzgebiet Tetenhusener Moor is a significant nature reserve in Schleswig-Holstein, offering routes for hiking, cycling, and jogging through its rare raised bog ecosystem.
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Cycling
Nature reserves in Schleswig-Flensburg are protected areas featuring diverse landscapes such as coastal marshes, inland moors, and riverine forests. This page aggregates 5 of these reserves, which are managed to conserve habitats for plants and animals while providing access for outdoor recreation. The district of Schleswig-Flensburg contains a total of 22 designated nature reserves.
Some of the most notable nature reserves in the district include the Natural Park Geltinger Birk, a large coastal reserve, and the Schleimündung at the mouth of the Schlei fjord. Other significant reserves featured include the cross-border Naturschutzgebiet Fröslev-Jardelunder Moor and the wetland area of Alte Sorge-Schleife.
The primary activities are human-powered outdoor sports. Across the nature reserves, there are over 550 routes for hiking, cycling, and running. Birdwatching is also a popular activity, particularly in coastal reserves like Geltinger Birk and Schleimündung.
The Natural Park Geltinger Birk is the largest nature reserve in the district, known for its wetlands, grasslands, and coastal scenery. It offers over 120 routes, including more than 40 hiking trails and over 25 cycling routes. The area is a crucial resting site for over 200 bird species, making it ideal for birdwatching.
The Schleimündung nature reserve is located where the Schlei fjord meets the Baltic Sea. Its landscape is a dynamic coastal environment with beach ridges, dunes, and salt marshes. It is a designated bird sanctuary, and a path along the dike provides opportunities for observing migratory and breeding birds.
Yes, there are numerous hiking trails available. The five reserves featured on this page offer a combined total of over 180 designated hiking routes. These trails traverse a variety of landscapes, from the coastal paths of Geltinger Birk to the moorland tracks in Fröslev-Jardelunder Moor.
Cycling is a popular activity within the designated trail networks of the nature reserves. There are over 100 touring bicycle routes and more than 60 road cycling routes across the reserves listed. The flat to gently rolling terrain in areas like Alte Sorge-Schleife is particularly suitable for cycling.
Yes, there are routes suitable for families and children. The varied terrain offers options for different ability levels. For a curated selection of routes, a guide to Family-friendly hikes in Schleswig-Flensburg is available.
Rules regarding dogs vary by reserve to protect wildlife and grazing animals. In many nature reserves, dogs must be kept on a short leash at all times. It is essential to check local signage and regulations for each specific area before visiting with a dog.
The coastal nature reserves, such as Schleimündung and Geltinger Birk, are significant resting and breeding areas for birds. While birdlife is present year-round, the spring and autumn migration periods are particularly active times for birdwatching. These seasons offer the chance to see a high diversity of species.
Some nature reserves and trailheads are accessible via public transportation. Planning a route using local bus services can provide access to certain areas without a car. A collection of Hikes from bus stations in Schleswig-Flensburg highlights trails that start near public transport links.

