Natural Arch Trail

Photo taken while looking up the canyon at the arch.

The King Mountain Natural Arch is an eighty foot high limestone arch located on the southern portion of King Mountain. The King Mountain Natural Arch Trail (#4343) is approximately 1/2 mile long and is generally snow free from May through mid-October. 

This non-motorized trail begins by going through a wooden jack fence and starts uphill. The trail continues uphill through great basin rye grass, mountain mahogany and sagebrush. The rock formations in the area are quite stunning. A series of steps characterizes the steepest parts of the trail. As the trail ascends higher, the vegetation changes to Douglas fir forest which provides welcome shade over the upper parts of the trail. Nearing the top, the trail switches back and heads toward the upper platform where the arch can be seen.    

At a Glance

Open Season: Mid-May
Usage: Medium
Restrictions: No motorized vehicles allowed on trail
Closest Towns: Arco, Mackay
Water: None
Restroom: None
Operated By: Forest Service

General Information


The last portion of the road to the parking area is unimproved and is recommended only for high clearance vehicles.  There is enough spaces for 2-3 vehicles.


From the intersection of US Highway 93 and US Highway 20 take US Highway 20/26 south to Highway Drive. Turn left on this road and follow to Dump Road. Turn left on Dump Road and follow it to Arco Pass Road. Turn left on Arco Pass Road and follow it 3.75 miles to a ranch. Turn right at the ranch and follow the road 1.25 miles to an intersection. Turn left and follow this road 2.25 miles to a road to the left. Turn left on the road and follow it 1.5 miles to a road to the right.  Turn right and follow this road 1.25 miles to the parking area. Follow the trail about 0.5 miles to the arch.


Day Hiking

Viewing Scenery

Recreation Areas

Recreation Activities


  Area/Length : 
0.6 miles

  Elevation : 
7,400 feet