The Mill Street Boat Ramp in Ridgefield features two paved ramps with a center launch float, paved parking (20 spaces), flush restrooms, and ADA-accessible facilities on Lake River at its confluence with the Columbia River.

Daily launch fees are $13 or $75 annually for residents, with a dedicated kayak launch also available at nearby Division Street.

This location serves as an excellent access point for paddling the Lake River water trail and exploring the Ridgefield National Wildlife Refuge area, though refuge lands themselves are off-limits to public access.