5.0
(4)
40
riders
6
rides
No traffic gravel bike trails around Barrage Du Gast traverse a landscape characterized by the serene Lac du Gast, a reservoir nestled on the edge of the Saint-Sever Forest. The region offers a mix of open lake views, passages through local woodlands, and rural settings. Terrain generally features gentle slopes and varied paths, including sections along the Vire River. Gravel biking routes here provide diverse surfaces, from paved to unpaved, suitable for various fitness levels.
Last updated: May 10, 2026
5.0
(1)
12
riders
139km
08:34
1,650m
1,650m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3
riders
25.0km
02:00
420m
420m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4
riders
45.3km
03:31
750m
750m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
1
riders
18.1km
01:17
220m
220m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
18
riders
118km
07:14
1,340m
1,340m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Barrage Du Gast
Toilets, water point and a huge collection of books for adoption!
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Amazing clock tower. According to the info sign the 'twin towers' are from the 12th C and the Belfry was added at the end of the 15th C. So a very historic spot. The small square in front of the tower is peaceful and hassle-free Use one of the many clean public benches as a base to enjoy your picnic. Afterwards go to the small cafe on the corner, order and pay for your coffee and they will bring it out to your table (a slight upgrade from the bench!). I discreetly ate a clafoutis de cerise with the coffee, and no-one objected.
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great place to rock climb and see the waterfall at mortain but ride to it from the other side of the river
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beautiful stained glass windows in this church which was spared by the bombings
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the most Good route Mont St Michel, via Mortain, St Hilaire, Isigny Le buat, Ducey, Ponobaut, All The village has The good Bakery and place for a small cafe, the most Good route Mont St Michel, via Mortain, St Hilaire, Isigny Le buat, Ducey, Ponobaut, All The village has The good Bakery and place for a small cafe,
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Charming little passage of a tributary of the Glanon with a small stone bridge for those who don't want to get their feet wet.
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There are 6 dedicated no-traffic gravel bike routes around Barrage Du Gast listed in this guide. These routes offer a range of distances and difficulties, ensuring a peaceful ride away from vehicular traffic.
The terrain around Barrage Du Gast is diverse, offering a mix of rugged paths and peaceful natural spaces. You'll encounter varied surfaces, including both paved and unpaved sections, with routes often following sections along the Vire River, through the Forêt de Saint-Sever, and around the serene Lac du Gast. Expect gentle slopes and varied paths, with some routes featuring more challenging climbs.
While all routes in this guide are designed to be traffic-free, their difficulty varies. For a moderately challenging option that could be suitable for families with some biking experience, consider the Stream crossing – Gast Dam loop from Saint-Sever. It's a 25 km route with moderate elevation, offering a good balance of distance and effort.
Generally, the natural areas around Barrage Du Gast, including the Saint-Sever Forest and the lake, are welcoming to dogs, especially on trails. However, it's always best to keep your dog on a leash, particularly near the Ornithological Reserve to protect wildlife, and to ensure you clean up after them. Specific rules may apply in certain protected zones, so look for local signage.
Many routes will take you past the beautiful Lac du Gast, which is a significant natural feature. You might also encounter the Ornithological Reserve, home to over 80 bird species, or pass through sections of the Saint-Sever Forest. Historic sites like the 16th-century Chapelle de l'Ermitage are also nestled within the forest, offering a glimpse into the region's heritage. For example, the Abbey Church of Saint-Sever – Gast Dam loop from Saint-Sever passes by the historic Abbey Church.
Yes, several routes in this guide are circular, allowing you to start and end at the same point. For instance, the Montjoie Wood – Gast Dam loop from Champ-du-Boult is a moderate 18 km circular route that offers scenic views around the dam and through woodlands.
The region is beautiful year-round, but spring and autumn generally offer the most pleasant conditions for gravel biking. The weather is milder, and the natural landscapes are vibrant with seasonal colors. Summer can also be great, but be prepared for warmer temperatures. Winter rides are possible, but some paths might be muddy or require more robust tires.
The Barrage Du Gast area provides practical amenities, including a picnic area, which often indicates nearby parking facilities. For routes starting from specific towns like Saint-Sever or Champ-du-Boult, you can typically find public parking within the village centers, which serve as convenient starting points for your gravel biking adventure.
The area is highly rated by the komoot community, with an average score of 5.0 stars. Reviewers often praise the tranquil environment, the diverse natural landscapes, and the excellent mix of open lake views and passages through local woodlands. The 'no traffic' aspect is particularly appreciated, allowing for peaceful and immersive rides.
Absolutely. If you're looking for a more demanding experience, Barrage Du Gast offers several difficult routes. The Former Railway Embankment – Along the Vire loop from Saint-Sever is a challenging 139 km route with significant elevation gain, perfect for experienced gravel bikers seeking a long and rewarding adventure.
Yes, the Barrage Du Gast site is well-equipped for visitors. Near the dam, you'll find a dedicated picnic area, children's games, and even a mini-amphitheater. These amenities make it a convenient spot for a break before or after your ride, or for families to enjoy.
While Barrage Du Gast is primarily accessed by car, some routes start from towns like Saint-Sever, which may have limited public transport connections. However, direct public transport to the more remote trailheads around the lake is generally not available. It's advisable to check local bus schedules for connections to nearby villages if you plan to rely on public transport.


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