A large natural lake just to the north of the town of Anmore. Only the south end of the lake is accessible for vehicles but there are extensive hiking trails all around the perimeter.
Lake where Laura's body is found in episode 5x12 "Dual Spires".
Source: Psych Forums
The SG teams are evacuating the inhabitants of this planet during a Goa'uld assault in episode 2x02 "In the Line of Duty".
Marcus finds Peter working on his boat and asks about strange violence on the island in episode 2x05 "There But for the Grace of God, Go I".