Blackwater River State Park, State park in Santa Rosa County, Florida.

Blackwater River State Park is a protected natural area in Santa Rosa County featuring pine forests, wetlands, and a river with distinctive dark water flowing past white sandy banks. Throughout the park, you can find camping areas, walking trails, and several spots to launch small boats into the river.

Blackwater River State Park was certified a Registered State Natural Feature in 1980 for illustrating Florida's natural history. In 1982 an Atlantic white cedar growing in the park was named a Florida Champion tree, one of the largest and oldest of its species. The park lies fifteen miles northeast of Milton, near Harold, off U.S. 90, at 7720 Deaton Bridge Road.

The park's name comes from the Blackwater River, called after its dark, tannin-stained water. Visitors today picnic under covered pavilions near the main parking area, launch canoes and kayaks, swim and tube in the river, and watch birds along the banks. Camping facilities are available in the park.

The park lies fifteen miles northeast of Milton, near Harold, off U.S. 90, at 7720 Deaton Bridge Road. The main picnicking area has covered pavilions, restrooms and a parking lot. Launch canoes, kayaks or tubes from the river access, and bring sturdy shoes for the hiking trails.

In 1982 an Atlantic white cedar in the park was named a Florida Champion tree, recognised as one of the largest and oldest of its species. The park itself had been certified a Registered State Natural Feature two years earlier, in 1980, for illustrating Florida's natural history.