Welcome to Saskatoon! It looks like we'll have a warm summer this year, and the flora will love that.
You can take long walks/ride bikes on the Meewasin Valley Trail beside the river , visit the Berry Barn's orchard/garden or one of the many strawberry-growing operations on the outskirts. The cool nights make some delicious strawberries. You have got to try them!
There's the Beaver Flats and Cranberry Flats outside the city. Hmmm, there's many places I'm sure I've missed but I can't remember offhand.