 The Johnson Creek watershed includes the subwatersheds of Badger Creek, Sunshine Creek, Kelley Creek, Mitchell Creek, Veterans Creek, Crystal Springs Creek, and smaller streams.Parks along the creek and its tributaries include natural areas, a wildlife refuge, a rhododendron garden, a botanical garden, and a bicycle and pedestrian rail trail that follows the creek for much of its length.Johnson Creek begins near the unincorporated community of Cottrell in Clackamas County, Oregon, southeast of Gresham in the foothills of the Cascade Range, and flows generally westward about to its confluence with the Willamette River, a major tributary of the Columbia River.