This area has the most southerly segment of an envisioned cross-Cascades trailbike route. The hoped for the trail would go from the Ahtanum area near Yakima to the Greenwater area northwest of Chinook Pass.

The Gray Rock segment begins at the Department of Natural Resources Tree Phones Campground. It ties with a Forest Service trail at Louie Way Gay on Divide Ridge over looking Rimrock Lake.

There are also short wheelbase four-wheel drive routes which tie with the Divide Ridge area.

Location: 33 mi W of Yakima

Phone: 509 925-6131

Trails: Trailbike - 24mi and 4 WD

Season: when snow -free

Fees: none

Mailing Address: Department of Natural Resources, 713 E. Bowers Road, Ellensburg, WA 98926