According to the Idaho Department of Fish and Game, the Elk Horn Road boat ramp in Lemhi County is a concrete boat ramp located on the Salmon River. The ramp is approximately 14 feet wide and can accommodate small to medium-sized boats. The Salmon River is open to both motorized and non-motorized boats, including rafts, kayaks, canoes, and powerboats. The latest information available on the Idaho Department of Fish and Game website confirms this information and recommends checking local regulations for any specific restrictions or closures.