The boat ramp named Knoxville Road 1601 is located in Napa County, California. It is a concrete boat ramp that provides access to Lake Berryessa, a large reservoir in the Napa Valley region. The ramp is approximately 16 feet wide and is suitable for launching small to medium-sized boats.

According to the Napa County Parks and Open Space website, the Knoxville Road 1601 boat ramp is open year-round and can accommodate a variety of watercraft, including motorized boats, sailboats, kayaks, and canoes. However, it is important to note that certain restrictions and regulations may apply based on the type of vessel and its intended use.

To ensure accuracy, it is recommended to check the latest information from the Napa County Parks and Open Space department or the California Department of Parks and Recreation before visiting the Knoxville Road 1601 boat ramp or any other boating facility in the area.