The Mary S Young State Recreation Area is a state park in the U.S. state of Oregon
. It is located within the city of West Linn
, alongside the Willamette River
and is heavily wooded. It offers more than five miles of hiking trails, bicycle trails, picnicking, bird watching, fishing, sports fields, and a very popular dog off-leash area.The park is owned by the Oregon Parks and Recreation Department, and operated through a cooperative agreement with West Linn.The park has recreation areas, wooded trails and a rocky beach.