Best attractions and places to see around Altenach, a commune in Alsace, France, include natural features and local heritage sites. The area is characterized by its network of ponds, such as the Natura 2000 site of Nérac Ponds, and is drained by the Largue and Lutter Rivers. Altenach serves as a starting point for exploring the wider Sundgau region, offering a mix of natural landscapes and historical points of interest.
Last updated: May 4, 2026
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The French and European National Cycleway is a great cycleway winding along side of the Rhine Rhone Canal with very little climbing, for those who do not like to climb. However those who are climbing shy, must be aware of the wind in this area. A lot of the locks still have the former lock man’s house which adds a bit of charm to every lock. One is never alone on this route as there is a constant passing of bicycles, both leisure and racing bikes.
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This former railway line is now a car-free cycle path that takes you from Dannemarie to Pfetterhouse, past ponds, forests and typical villages of the Sundgau. The route is slightly undulating and well paved. You cycle through one of the most rural parts of Alsace, with plenty of chance to spot herons, dragonflies and carp.
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The Port fluvial de Dannemarie is no ordinary marina – it’s an unexpected oasis along the canal, where boats bob gently and herons keep watch. For cyclists, it feels like a little refuge: a place to take a break from the rhythm of your pedals and take on the rhythm of the water. Here you can refill your water bottle, stretch your legs on a bench in the shade or a little further away at the restaurant, or just watch the sun play on the surface of the canal.
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The Écluse d’Eglingen is a small, active lock on the Canal du Rhône au Rhin, near the village of Eglingen in the Sundgau region. This spot is popular with cyclists due to its quiet location along the 'EuroVelo 6' and regional cycle routes. The lock is surrounded by greenery and offers a bench and shade, but no facilities.
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Really easy ride along the cycle way. Goes downhill from Pfetterhouse to Dannemarie. Enjoyable
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There is a nice restaurant near the harbor.
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The Porte d'Alsace boating lodge is located near Dannemarie, a central town with all the necessary shops. The lodge can accommodate around fifty boats of all sizes on three different pontoons. Drinking water and electricity are available to boaters (according to the terms and conditions defined by the local authority). A laundromat, restrooms equipped with showers, playgrounds, green spaces, and picnic tables are available to boaters and their guests.
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Great impression of these locks with the lock keepers' houses. Gems and places to unwind. Just beautiful
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Altenach is rich in natural beauty, particularly its waterways and ponds. The Nérac Ponds (Les Étangs de Nérac), located in Altenach and Saint-Ulrich, are a significant Natura 2000 site known for birdwatching, hosting over 100 bird species. An untreated wooden observatory is available for visitors. The area is also drained by the Largue and Lutter Rivers, offering scenic landscapes.
While Altenach is a small commune, it features local landmarks such as the Église Saint-Sylvestre and the Chapelle Sainte Barbe. Additionally, you can find various commemorative monuments throughout the area, reflecting its local heritage.
The area around Altenach is ideal for cycling and exploring by bike. You can enjoy routes along the Canal du Rhône au Rhin or the Largue Valley Cycle Path. For more cycling options, explore the Cycling around Altenach guide, which includes routes like the 'Eglingen Lock – Blue drawbridge Zillisheim loop'.
Yes, the Maison de la Nature Discovery Trail offers an engaging experience for families. It features educational facilities, games, and informational panels on topics like organic gardening, a scent spiral, a pond, and a beehive. A booklet is available to guide visitors along the route. Many of the cycle paths, such as the Largue Valley Cycle Path, are also suitable for families.
You can observe impressive canal infrastructure at several points. The Port of Dannemarie is a popular canal port and nautical relay. Further along, the Eglingen Lock and the Valdieu-Lutran lock scale demonstrate how height differences are managed for water transport, offering a fascinating glimpse into engineering.
Visitors particularly appreciate the peaceful setting and the opportunity to observe the canal's operations. At the Port of Dannemarie, many enjoy taking a break, watching boats, and utilizing the amenities. The locks, like Eglingen Lock, are valued for their quiet location and scenic views, especially by cyclists.
Yes, there are several mountain biking trails in the vicinity. You can find routes like the 'Ballersdorf Viaduct – Notre Dame des moissons loop from Dannemarie' or the 'Canal du Rhône au Rhin – Écluse Muehlenmatten loop from Dannemarie'. For a comprehensive list, check out the MTB Trails around Altenach guide.
The Largue Valley Cycle Path is a former railway line transformed into a car-free route. It takes you from Dannemarie to Pfetterhouse, passing by ponds, forests, and typical Sundgau villages. It's well-paved, slightly undulating, and offers a chance to spot local wildlife like herons and dragonflies. It's known for its beautiful shady sections along the Largue River.
Absolutely. The region offers various road cycling routes, including the 'Largue Valley Cycle Route' and the 'Eglingen Lock – Balschwiller Washhouse loop from Dannemarie'. These routes provide opportunities to explore the wider Sundgau region. More options are available in the Road Cycling Routes around Altenach guide.
The Nérac Ponds are a haven for biodiversity, particularly for birdwatching. As a Natura 2000 site and part of Alsace's Sensitive Natural Areas, they host over 100 bird species, including rare ones like the Penduline Tit, Osprey, and Common Crane. The presence of an untreated wooden observatory enhances the experience for wildlife observers.
The Port of Dannemarie is a great spot to take a break, especially for cyclists. It offers amenities like shops and a refreshment bar where you can get supplies. It's a pleasant place to watch the boats and enjoy the canal atmosphere, with opportunities to refill water bottles or relax in the shade.


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