Lac Kir is a gorgeous lake park just west of the city, where a well-groomed dirt path circumnavigates the water. A full loop around the park, starting from the camping area, is about 5 km, but there are lots of side paths, nooks, and little beaches to explore. To get great views of the lake and enjoy a bit of a trail run, cross over to Fontaine aux Fées Park, which has a series of hilly paths. Good crossing at the parking area near the restrooms and Le Mandarin restaurant.
For a longer run, runners can hop on paths along the Quai des Carrières Blanches on the south side of the park.