The Portland Public Ramp, an MNR-operated boat launch on Big Rideau Lake, is located on Highway 15 approximately 1. 5 kilometres north of Portland, Ontario. The site features a gravel ramp with no dock, and can accommodate boats up to 18 feet in length.

There is no launch fee. The launch area includes good parking, a toilet, picnic tables, and a lookout area, making it a practical access point for boaters and paddlers heading out onto Big Rideau Lake.