Geology
Graham County, AZ
Approximate location — plotted from published sources, not a site visit, and not a guarantee of access.
Highway pass and USFS campground on AZ-266 across the southern Pinaleño (Mount Graham) sky island—classic Arizona Basin-and-Range/sky-island geology with abrupt multi-thousand-foot relief from desert floor to high peaks. Apex camping and the Shake Trail give public overlooks of Pinaleño south slopes, Sulphur Springs Valley, and the Galiuro/Santa Catalina ranges to the west.
| Region | Graham County, AZ |
|---|---|
| Coordinates (approx.) | 32.5917, -109.8494 |
| Agency | USFS Coronado National Forest / Safford Ranger District |
| Elevation | ~5,600 ft at pass campground |
| Geology | Pinaleño metamorphic core-complex sky island; high vertical relief above basin fill |
| Trail | Shake Trail #309 climbs from the campground toward Swift Trail country |
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Plan ahead. Leave no trace. Verify current access before traveling.