Gray Rock Trailhead For ATV Riding

The 14th most popular all terrain vehicle trail in Washington.

  Yakima, Washington, US


  July 2, 2016

In Yakima County on the Ahtanum Multiple Use Area, the Gray Rock Trailhead provides access to 23 miles of ATV riding.

To reach the Gray Rock Trailhead (aka Tree Phones Campground trailhead): Tree Phones Campground is located on the Middle Fork of Ahtanum Creek, 15 miles from Tampico, WA. From I-82 (north or southbound), take the Valley Mall Boulevard exit, then head ...

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