Gales Creek, is a tributary, 23.5mi long, of the Tualatin River in Washington County, Oregon, United States. The headwaters of Gales Creek are on the north side of the mountain Round Top in the Northern Oregon Coast Range. The community of Gales Creek, Oregon, is near the creek, which further downstream forms the southwest border of the city of Forest Grove.CourseGales Creek arises at an elevation of 2387ft above sea level and falls 2233ft between source and mouth to an elevation of 154ft. The stream begins at river mile (RM) 23.5 or river kilometer (RK) 37.8 on the north side of Round Top, a mountain in the Northern Oregon Coast Range. Lying entirely within Washington County, the creek at first flows west, then south, then east just before reaching Gales Creek Forest Park, on the left, and receiving Low Divide Creek from the right at RM 22.76 (RK 36.63). Downstream of the park, Oregon Route 6 is on the right as the stream receives North Fork Gales Creek from the left and shortly thereafter South Fork Gales Creek from the right 20.70mi from the mouth.Finger Creek and Coffee Creek enter in quick succession before Gales Creek passes under Route 6 and flows by Gales Creek Children's Camp, passes under Route 6 again and then County Road 374 before reaching the community of Glenwood and receiving Beaver Creek from the left 18mi from the mouth. Turning south, the creek receives Bateman Creek from the right about 2mi below Glenwood. Gales Creek turns to the southeast, and Lyda Creek enters from the right before Gales Creek passes under Route 6 for the third time and receives White Creek from the right. At this point, Gales Creek is flowing parallel to Oregon Route 8, which is on the stream's right.
