The Oroville Wildlife Area Thermalito Afterbay Outlet boat ramp provides access to the Feather River upstream of the Afterbay outlet within the wildlife area boundary.

The ramp is a combination of gravel and articulated concrete block mat; four-wheel drive vehicles are advised when conditions are muddy or during low river flows.

A restroom is available at the adjacent day use/camping area, and the site is popular for river fishing, particularly during salmon runs.