The 516-acre Swale Creek unit straddles Swale Creek, west of Centerville. The habitat is mostly steppe with riparian areas along two creeks, offering upland game bird hunting opportunities. Open hillsides support stands of native short grasses, balsamroot and several species of lupine. Gray partridge, golden eagles and western meadowlark can be found on the wildlife unit. Hiking and wildlife watching are popular activities at Swale Creek.