This is part of the William O. Douglas Trail, which runs from Davis High School in Yakima to Mt. Rainier. This trail is still being established. Most of it runs on state land inside the wild game fence.
From the Snow Mountain Ranch parking lot walk west to Sunset Road, then up Sunset Road along the wild game fence to a gate. The gate is located where the paved road curves east, with an apple orchard to the north. There is a small gate you can push open and walk through.
You will be on an old jeep road that travels up a gradual incline. Take a left at the top of the incline, and about half a mile of flat trail follows. Follow the old roadbed west to another fence about 1.35 miles from the wild game fence. There is no gate on this fence; continue through it.
Continue uphill, bordering the wild game fence but not through it, paralleling an outdoor shooting range to the corner of the fence. Continue following the trail and the fence north to pick up the jeep road again at another gate. This gate is closed and locked, so it has not been driven through in a while. Use the gate as your guide and turn left (east) here, going uphill. The trail will become more established and easier to see as you continue on.
As you climb, balsamroot and lupine become profuse and the views become more expansive. Look for Mount Cleman to the north, Cowiche Mountain to the southeast, the agricultural lands around Cowiche and Tieton and Yakima Valley in the distance to the north and southeast, and the eastern edge of the Cascades to the west.
When the road levels, watch for another jeep road heading southeast (sharply left). There is a sign or guide post thanks to the Cowiche Canyon Conservancy with the words "Box Springs" on it. Turn left (south) here. The trail can be faint, but will become more obvious as you go. Follow this road along the hillside to Box Spring, situated in a grove of Garry Oaks, overlooking the cliffs at the head of Box Spring Canyon.