www.saint-chaffrey.fr Local Marie official site, good for local info
www.meteofrance.com weather, select 05330 for Saint Chaffrey
In the Local Walks map, walks from Chalet Jumeau are indicated. Of course there are many others, but here only paths known to Google Maps can be included. In addition, many canals have paths on one side (usually the downhill side, but not always) that are not indicated on Google Maps, so cannot be indicated.
For best views, try the Google Earth 3D views, and/or hide all the routes that you aren't looking at.
The last route is actually a car route to get to a parking spot near Pont d'Asfeld, Briançon, which is a great place for access to the Pont and its paths, and also for the historic city centre.
Other sites have many other walks indicated, here are some:
Des bords de la Guisane aux hauteurs de Saint-Chaffrey
Cascade de la Pisse - Bois des Rousses - Bois de l'Ours à Saint-Chaffrey
Le Canal Neuf au départ de Briançon Les Canaux de la Guisane