Salmon Creek is a 26-mile (42 km) tributary of Lake River in Clark County in the U.S. state of Washington. Beginning from its forested headwaters on Elkhorn Mountain, Salmon Creek passes through rural, agricultural, residential, and urban areas before flowing into the river just north of Lake Vancouver. Lake River is a tributary of the Columbia River. Major tributaries to Salmon Creek are Mill, Woodin, Rock, Morgan, and Curtin creeks. Several smaller streams, including Curtis Creek also flow into Salmon Creek.
Klineline Pond and Battle Ground Lake are the only two lakes in the watershed that are larger than 5 acres (2 ha). Salmon Creek Park at the pond offers picnicking, fishing, swimming, and hiking opportunities. The Salmon Creek Greenway Trail follows the creek for about 3 miles (5 km) between the pond and Felida Bridge. Connecting trails include Cougar Creek Trail and a trail between Klineline Pond and East Lake, east of Interstate 5. Battle Ground Lake State Park, is a 280-acre (110 ha) camping park in the forest near the city of Battle Ground, east of Vancouver. Amenities at the park include picnic sites, trails, cabins, as well as fishing and a boat launch on 28-acre (11 ha) Battle Ground Lake.