The River Road Royalston boat ramp is located on the Millers River in Royalston, Massachusetts. It is a popular boat launch site that provides access to the Millers River for various types of watercraft, including canoes, kayaks, and small motorboats.

According to the Massachusetts Department of Fish and Game's website, the River Road Royalston boat ramp is a concrete ramp that is approximately 20 feet wide and has a moderate slope. It is suitable for launching small boats and can accommodate trailers. The website also states that the boat ramp is open year-round, and there is no fee for its use.

The Millers River, which the boat ramp services, is a 52-mile-long tributary of the Connecticut River. It flows through central Massachusetts and provides opportunities for fishing, boating, and other recreational activities. It is known for its scenic beauty and diverse wildlife, including bald eagles, river otters, and various species of fish.

In terms of permitted watercraft, the Massachusetts Department of Fish and Game's website states that the River Road Royalston boat ramp is open to "non-motorized and motorized boats that meet Massachusetts boating regulations." This means that canoes, kayaks, and small motorboats with appropriate safety equipment and registration may be launched from the ramp.

Overall, the River Road Royalston boat ramp appears to be a well-maintained and accessible launch site for small boats on the Millers River in Massachusetts.