One of the great features of Josselin is that it is set on the canalised River Oust (the River forms part of the Nantes-Brest Canal). Besides forming the perfect back drop to the Chateau, the canal offers a number of leisure opportunities.
A pleasant 15 minute stroll west along the towpath besides the Oust leads to the Ile de Beaufort, and island stretching between the river and the lock that allows canal boats to pass. This makes for a beautiful picnic spot, with grassy banks shaded by willow trees.
If you are feeling more energetic you can hire canoes/kayaks & cycles from the River Quay May to September. A cycle to Le Roc St Andre for lunch and back should be within the capabilities of most occasional cyclists. If you take a picnic, you will find regular halts with picnic tables along the canal bank.
If you prefer a powered boat, Nico Nautic hire river boats in summer (10am-8pm/4 & 6 person boats/hiring from 30 min. to a full day), with suggested circuits for 1, 3 and 7 hour trips.