The 10,386-acre unit was acquired in 2009 and 2011 from Plum Creek Timber Company. The property is 35 miles northwest of Yakima in Kittitas County, lying north of the Naches River in the Rock Creek, Gold Creek, Milk Creek and upper Wenas Creek drainages. Multiple US Forest Service System roads provide access to the unit. Mountain goats roam the alpine areas in the Rock Creek unit, while the shrub steppe and basalt cliffs are home to elk, mule deer, and bighorn sheep. Rivers and streams flowing through the unit are used by bull trout, cutthroat and rainbow trout, as well as salmon. Recreation opportunities include hunting, camping, hiking, wildlife viewing and ORV trails. The unit has breathtaking views of Mount Rainier from the top of Bald Mountain and unique landforms like Devils Slide. The property is in checkerboard ownership with the U.S. Forest Service. The Washington Department of Fish and Wildlife works with the Forest Service to manage several motorized trails, which provide a destination for motorized recreation in the summer and fall.