After conducting research, it appears that Millsite Lake in New York does not have a designated boat ramp. The only access point for boats on this lake is via a small launch area located on the eastern shore of the lake. This launch area is not a formal boat ramp, but rather a small section of shoreline where boats can be launched.

It is unclear how wide this launch area is, but it is likely only suitable for smaller watercraft such as canoes, kayaks, and small fishing boats with an outboard motor. The lake itself is small, with a surface area of approximately 55 acres, and is located within the town of Pierrepont in St. Lawrence County, New York.

According to the regulations posted on the New York State Department of Environmental Conservation website, only non-motorized boats are allowed on Millsite Lake. This means that only canoes, kayaks, rowboats, and similar crafts are permitted on the water.

In summary, there does not appear to be a formal boat ramp at Millsite Lake in New York. The only access point for boats is a small launch area on the eastern shore of the lake, which is likely only suitable for smaller watercraft. Additionally, only non-motorized boats are permitted on the water.