Koshlong Lake's south boat ramp provides public launch access to this mid-sized, deep-water lake in the Haliburton Highlands of Central Ontario.

The ramp sits near the southern end of the lake, making it a convenient put-in point for paddlers and boaters heading toward Bark Bay, a favourite destination for crown-land camping among rocky points and towering pines. Koshlong Lake stretches roughly 5.

7 kilometres in length and reaches a maximum depth of 43 metres. Its waters are considered oligotrophic — low in nutrients and high in clarity — a hallmark of classic Canadian Shield lakes.

The public launch is noted as an alternative to the nearby dam access point, offering a shorter paddle to the lake's southern reaches.