4.4
(107)
3,014
runners
16
runs
Jogging around Lac D'Arzal offers a diverse landscape shaped by its unique location on the Vilaine estuary, providing a blend of freshwater and saltwater influences. The region features picturesque waterside paths, including routes along the impressive Arzal Dam, which is Europe's largest estuarine dam. Runners can experience varied terrain, from flat stretches near the port to more undulating trails around historical sites and coastal paths, catering to different preferences and fitness levels.
Last updated: October 7, 2026
3.8
(5)
139
runners
6.99km
00:50
140m
140m
Moderate run. Good fitness required. Mostly accessible paths. Some sure footedness required.
4.0
(3)
87
runners
29.2km
03:28
360m
360m
Hard run. Very good fitness required. Mostly accessible paths. Some sure footedness required.

89
runners
21.9km
02:36
280m
280m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
64
runners
13.0km
01:30
170m
170m
Moderate run. Good fitness required. Mostly accessible paths. Some sure footedness required.
23
runners
12.6km
01:25
150m
150m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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I was stunned by the number of boats that winter here.
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I did not visit the museum but there is a beautiful viewpoint.
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An incredible place that you discover around a bend. Magnificent!
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The port is very beautiful but even if you have to climb, the old town is also worth a visit
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The Bourigan windmill is an old windmill that has lost its sails but is distinguished by its "large head" (a typical shape for a windmill with a massive body). It was heightened in the 20th century, giving it a unique profile. Although it is not open to the public, this windmill remains an emblematic vestige of Breton rural heritage, marking the region's milling history.
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This rocky outcrop offers a magnificent view of the Roche-Bernard Bridge spanning the Vilaine River. Be careful, as the area can be dangerous!
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This old ruined mill is unfortunately not very visible due to the numerous weeds that hide the building.
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There are over 15 dedicated running routes around Lac D'Arzal, catering to various fitness levels. While many routes are moderate or difficult, the area's diverse landscape offers options for different experiences.
The terrain around Lac D'Arzal is quite varied due to its unique estuarine environment. You can expect a mix of flat stretches, particularly near the port, and more undulating trails around historical sites. Some routes also offer picturesque waterside paths and scenic coastal experiences.
While the majority of routes are rated moderate to difficult, the region does offer sections with easier, flatter terrain, especially near the port. For a moderate option, consider the Morbihan Bridge – Old Bridge loop from La Roche-Bernard, which is about 4.3 miles (7.0 km) long and takes approximately 50 minutes.
Joggers can enjoy several notable landmarks and natural features. You can run along the impressive Arzal Dam, Europe's largest estuarine dam, offering pathways and views of the estuary. The Old Port of La Roche-Bernard, a 'Small Town of Character' with its historic houses, provides charming scenery. You might also cross the Morbihan Bridge, which offers expansive views.
Yes, for experienced runners seeking a challenge, there are several longer routes. The La Roche-Bernard Bridge – Morbihan Bridge loop from La Roche-Bernard is a difficult 44.7 km (27.8 miles) path with significant elevation gain, offering extensive views across the estuary.
The running routes in Lac D'Arzal are highly rated by the komoot community, with an average score of 4.4 stars from over 80 reviews. Runners often praise the diverse landscapes, the picturesque waterside paths, and the unique blend of natural beauty with historical sites like La Roche-Bernard.
Yes, many of the running routes in the area are designed as loops, offering a convenient way to explore without retracing your steps. For example, the Old Port of La Roche-Bernard – Port of Camoël loop from La Roche-Bernard is a 13.7 miles (22.0 km) circular trail.
The varied terrain means some sections are more suitable for families. Flatter paths near the port or along parts of the Arzal Dam could be good options for a leisurely family jog. Always check the route difficulty and length to ensure it matches your family's capabilities.
Generally, many outdoor trails in France are dog-friendly, especially if your dog is kept on a leash. However, specific rules can vary by location or protected area. It's always advisable to check local signage or regulations for any particular route you plan to take to ensure dogs are permitted.
The region benefits from a mild climate, making it suitable for running for much of the year. Spring and autumn offer pleasant temperatures and beautiful scenery. Summer can be warm, but the waterside paths provide refreshing breezes. Winter running is also possible, though some paths might be muddier after rain.
Yes, there are routes that connect these significant points. The Morbihan Bridge – La Roche-Bernard Bridge loop from La Roche-Bernard is a challenging 18.2 miles (29.2 km) route that links these two bridges, providing extensive views across the estuary and surrounding landscapes.
Parking is generally available in and around key points like the Old Port of La Roche-Bernard and near the Arzal Dam. Many routes start from these accessible locations, making it convenient to park and begin your run.


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