the mouth. Here the outskirts of West Linn are on the left. From West Linn to Oregon City, I-205 and Willamette Falls Drive run roughly parallel to the river to its left. About later, Canemah, a neighborhood of Oregon City, is on the right and Tanner Creek enters from the left as the river approaches Willamette Falls. Oregon City to Columbia River The river flows by Abernethy Island and Moore's Island and by a USGS stream gauge before plunging about over the falls. At the falls, West Linn is on the left and Oregon City on the right. Below the falls, the river passes under the Oregon City Bridge, which carries Oregon Route 43, and less than later, the Abernethy Bridge, which carries I-205. At about RM 25 (RK 40), the Willamette passes Clackamette Park, which is on the right, and the Clackamas River enters from the right opposite Goat Island. Flowing around the island, the left-hand channel passes through Clackamas Rapids. The right-hand channel flows by the city of Gladstone, which is on the right. About further downriver, Mary S. Young State Recreation Area is on the left, and then the river passes Cedar Island. Below that, it flows around Hog Island, opposite Marylhurst University, which is on the left. As it reaches the city of Lake Oswego, the river receives Oswego Creek, which drains Oswego Lake, from the left. From Lake Oswego to near the Ross Island Bridge in Portland, Oregon Route 43 runs roughly parallel to the river and to its left. Downriver, about from the mouth, the Willamette receives Tryon Creek from the left, opposite the unincorporated community of Oak Grove, and flows under the Lake Oswego Railroad Bridge, which carries a branch of the Southern Pacific Railroad. Then the river passes the unincorporated community of Dunthorpe, which is on the left, and flows around Elk Rock Island. Between Dunthorpe and the Sellwood neighborhood of Portland, the river forms the boundary between Multnomah County, on the left, and Clackamas County, on the right. Reaching the city of Milwaukie, the Willamette receives Kellogg Creek from the right and then Johnson Creek from the right slightly above RM 18 (RK 29). Below Milwaukie, the river passes between Sellwood, on the right, and the River View Cemetery, both in Portland, and flows under the Sellwood Bridge, which carries Southeast Tacoma Street. Below the bridge, Sellwood Riverfront Park, Oaks Amusement