The boat ramp at Oastler Lake sits within Oastler Lake Provincial Park near Parry Sound, Ontario. It provides access to this small, irregularly shaped inland lake, which is suitable for powerboats less than 20 feet in length.

The launch is modest in scale, and some visitors note that 20 feet may feel like a tight fit in practice. A small parking area and dock are located adjacent to the ramp, available on a first-come, first-served basis.

The lake is also popular with canoes, kayaks, and stand-up paddleboards. Anglers come here to fish for northern pike, bass, and rainbow trout.