According to the latest information available, the boat ramp named State Route 20 899 in Skagit County, Washington is a concrete boat ramp that is 16 feet wide. It is located at a latitude of 48.45475006 and longitude of -122.51319122. The ramp provides access to the Skagit River, which is a popular destination for fishing and recreational boating.

The body of water serviced by this boat ramp is primarily used for small watercraft, such as canoes and kayaks, as well as for fishing boats. The Skagit River is known for its diverse fish population, including salmon, steelhead, and trout.

It is important to note that regulations regarding permitted craft and activities on the Skagit River may change over time, so it is always best to check with local authorities or official sources for the most up-to-date information.