Union River Access offers a small hand-launch boat access point located on State Route 300 about 0. 7 miles southwest of Belfair, providing year-round access to the Union River at the inland terminus of Hood Canal.

The site features a single parking lot and is open during daylight hours only; note that a Discover Pass is required.

This access point is part of the Union River Wildlife Area Unit, which also offers an interpretive trail and is popular for waterfowl hunting and wildlife viewing.