Skjellbreia is a lake in the Bymarka region to the west of Trondheim. The lake makes for a lovely hike in summer and you can enjoy the facilities at the Grønlia hut to its north.
Grea views of Trondheimsfjorden from the well-paved road. It's pretty flat so with a good wind you can pick up some decent speed between Flakk and Rye.