Biddle Butte is also known as Mount Zion and is located in Skamania County, Washington, about 20 miles west of Portland, Oregon. Biddle Butte is 1,460 feet ASL and was named for Henry J. Biddle, an early conservationist of the Gorge. Biddle was responsible for building the trail to the top of Beacon Rock, completed in 1918. There is no public access to this summit.
Although Mount Zion Road appears to go to the summit it is a private road and one must pass through gates marked "No Trespassing" and "Private Property" to access the summit which is occupied by communication towers. The only access to the summit is through private property and likely the summit itself is private land. The highest elevation possible on public streets is about 1,230 feet ASL, short of the activation zone.