Catherine Creek - Course

Course

Catherine Creek, flowing entirely within Union County, begins at the confluence of North Fork Catherine Creek and South Fork Catherine Creek in the Wallowa–Whitman National Forest. Running generally northwest from the foothills of the Wallowa Mountains along Oregon Route 203, the creek receives Little Catherine Creek from the right before entering Catherine Creek State Park. Continuing northwest through the city of Union, the creek receives Pyles Creek from the left and Little Creek from the right before turning away from the highway. Meandering north across the Grande Ronde Valley, the creek receives Ladd Creek (below its confluence with Gekeler Slough) and McAlister Slough, both from the left, and Mill Creek from the right before entering the Grande Ronde River west of Cove. The larger stream is a tributary of the Snake River.