South Waterfront Park Trail Downtown is a boat ramp located in Portland, Oregon. It is a public boat ramp that is open all year round and is free to use. The boat ramp provides access to the Willamette River, which is the primary water body that it services.

The South Waterfront Park Trail Downtown boat ramp is a concrete boat ramp that is 20 feet wide and approximately 100 feet long. It is designed to accommodate a variety of watercraft, including canoes, kayaks, paddleboards, and small motorized boats. The ramp has a gentle slope and is suitable for launching and retrieving boats of all sizes.

According to the latest information available, the South Waterfront Park Trail Downtown boat ramp allows motorized boats up to 21 feet in length. However, it is important to note that boaters must comply with all state and local regulations, including licensing and registration requirements, and must ensure that their watercraft meets all safety standards.

Overall, the South Waterfront Park Trail Downtown boat ramp is a popular and convenient access point for boaters looking to explore the Willamette River. Its central location and easy accessibility make it a great choice for both locals and visitors to the area.