Based on the latest information I could find, the Grand Lake Road boat ramp in Piscataquis County, Maine is a concrete ramp with a gravel parking lot. It is approximately 12 feet wide and can accommodate small to medium-sized boats. This ramp provides access to the northern end of Sebec Lake, which is a popular destination for recreational fishing, boating, and swimming. According to the Maine Department of Inland Fisheries and Wildlife, Sebec Lake is open to a variety of watercraft, including motorized and non-motorized boats, canoes, and kayaks. It is important to note that all boats using this ramp must comply with state regulations regarding permits, safety equipment, and boating under the influence laws.