Bonnie Lake is a small lake in Alberta, Canada. It is located 6 km outside of Vilna, Alberta, north of Highway 28, and is part of the North Saskatchewan River basin. The lake has a surface of 3.77 km² and reaches a maximum depth of 6.1 m, while the average depth is 3.1 m. Bonnie Lake drains a total area of 49.6 km². The lake drains through …Bonnie Lake is a small lake in Alberta, Canada. It is located 6 km outside of Vilna, Alberta, north of Highway 28, and is part of the North Saskatchewan River basin. The lake has a surface of 3.77 km² and reaches a maximum depth of 6.1 m, while the average depth is 3.1 m. Bonnie Lake drains a total area of 49.6 km². The lake drains through its south shore into Stony Creek which empties into the North Saskatchewan River.