Tips
Fabrice Rigalleau
March 23, 2026
Road cycling
An ancient feudal fortress, the castle of Derval was considered in its time as one of the strongholds of the Marches of Brittany with its 9 towers. After experiencing prestigious sieges, including that of Du Guesclin, in 1598, it would fall under the axe of the Edict of Nantes which condemned it to demolition. The only remnant, the old keep, renamed Tour Saint-Clair and giving its name to the castle, still resists and bears witness today to the history of the castle known since the 11th century.
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Nearby routes
Best routes near Château Saint Clair
4.0
(3)
9
riders
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
Moderate
4.0
(3)
7
riders
47.3km
02:01
280m
280m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
Moderate
6
riders
77.5km
03:32
530m
530m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
Moderate
Details
Informations
Elevation 50 m
Weather
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Sunday 11 October
21°C
12°C
94 %
Additional weather tips
Max wind speed: 17.0 km/h
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