The Lewis and Clark Trail Highway boat ramp located in Skamania County, Washington is a concrete boat ramp with a single lane and a 20-foot width. It provides access to the Columbia River, which is the body of water it services. The ramp is open year-round and can accommodate small to medium-sized boats. According to the Skamania County website, boats up to 26 feet long and 8 feet wide are permitted on the water. It is important to note that regulations regarding boat size and type may change, so it is recommended to check with local authorities for the latest information to ensure accuracy.