Shuswap Lake is shaped like an addled H, and is made up of four large arms: the Shuswap Lake Main Arm, Salmon Arm, Anstey Arm, and Seymour Arm. The product of the glacial scouring that also rounded the surrounding Shuswap Highlands, all four arms converge at Cinnemousun Narrows.

There are 28 walk-in campsites in the park. Reservations are not accepted at the park, and all campsites are available on a first-come, first-served basis. Basic facilities are provided - picnic tables, pit toilets, fire pits, firewood, and water. Visitors should bring their own potable water. A hand-pump does provide fresh water from the lake, but this water should be boiled before drinking. There are no telephones in the park.

Use caution around buoys indicating that scuba divers are in the area and refrain from boating in areas designated for swimming. Houseboats may not beach between the signs at Haven Point and the ranger cabin during the period from June 28 to Labour Day. Some sites do not have protected beaches. In stormy weather, it is advisable to beach your boat stern-first, and secure it with long ropes from the bow to pegs on the shore. Houseboats should be beached according to instructions received from the rental companies.