Sunset Bay State Park is a state park in the U.S. state of Oregon. Administered by the Oregon Parks and Recreation Department, it is about 0.4 miles (0.6 km) south of Cape Arago Lighthouse and 2.5 miles (4.0 km) outside the town of Charleston on Coos Bay. The park offers a crescent shaped beach, tide pools, hiking trails and a year-round campground. Sunset Bay is home to one of Oregon's ghost forests, created by an earthquake on the Cascadia subduction zone that dropped the shoreline about 1,200 years ago. The shoreline contains stumps of drowned spruce trees.