Highlight • Monument
Submarine Dry Dock, Saint-Nazaire
Mountain biking
4.8
(20)
Gravel riding
5.0
(1)
Road cycling
5.0
(1)
Cycling is not permitted at this location
Tips
Thomas
September 5, 2025
Mountain biking
The Saint-Nazaire U-boat bunker is one of five German U-boat bases built on the French Atlantic coast during World War II. The 301-meter-long bunker was built in just 16 months in 1941/42 using almost half a million cubic meters of concrete. Several hundred men were stationed here until May 1945; offices, workshops, and a medical center were housed under the roof, which was up to 9.60 meters thick. It was built on the site of the former overseas port from which steamers departed for Central America.
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Nearby routes
Best routes near Submarine Dry Dock, Saint-Nazaire
4.0
(5)
35
riders
27.7km
01:37
150m
150m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
Easy
5.0
(3)
8
riders
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
Easy
Details
Informations
Elevation -10 m
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Tuesday 25 August
27°C
17°C
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