The boat ramp at Oastler Lake Provincial Park sits within the park at 380 Oastler Park Drive in Parry Sound, Ontario. Ontario Parks describes it as a small launch with limited space, available on a first-come, first-served basis.

A small parking area and dock are located nearby. The ramp provides access to Oastler Lake, a small, irregularly shaped inland lake suited to boats up to 20 feet in length.

The lake is popular for fishing — bass, pike, and trout are present — as well as paddling by canoe, kayak, or stand-up paddleboard. The compact size and shape of the lake make it well suited to leisurely exploration rather than high-speed boating.