Before the Wharf Project, there was a street here called Marlyn Drive. At the very end of that road was the boat launch for Gravenhurst Bay. All that is left here now is the original launch sign (and concrete ramp) which you will find beside the launch area - very near the cache site. The newer, more used launch is just to the east of that. EXTREME steath is required here, especially in the summer months.
This cache replaces a previous one but it is an excellent spot.