The United States Congress designated the Mount Trumbull Wilderness (map
) in 1984 and it now has a total of 7,880 acres
All of this wilderness is located in Arizona
and is managed by the Bureau of Land Management.
Just north of the Grand Canyon and Mount Logan Wilderness, located at the southern end of the Uinkaret Plateau, Mount Trumbull is a large, basalt-capped mesa rising from about 5,400 feet to 8,028 feet. Steep south and west slopes are dominated by piñon and juniper with cliff rose, manzanita, silktassel, and shrub live oak. You may see groves of aspen and Gambel oak with big sage, agave, and cactus lower down. On top of this plateau is a pristine forest of ponderosa pine that has never felt the logger's saw.
Mule deer, Kaibab squirrels, coyotes, bobcats, mountain lions, jackrabbits, skunks, porcupines, big brown bats, and other smaller mammals inhabit the area. Wild turkeys, hawks, owls, and other birds are abundant. Close to the ground many lizards, skinks, and snakes slither and scamper, among them the western diamondback rattler.
The Mount Trumbull Trail climbs about five miles round-trip to the summit. The trail fades out as you near the top, so bring a map and compass to reach the northern rim of the mountain where you will see superb views of the region to the north, west and east as far away as 90 miles. Not far from the base of the mountain at Nixon Flat and near the Mt. Trumbull Trailhead, potable water is usually available.
Climate in the Arizona mountains varies greatly with elevation. The higher elevations generally receive much more precipitation and much cooler temperatures than the lower elevations. Summers at the high elevations bring warm daytime temperatures with cool nights. Low elevations often experience very hot summer temperatures. Afternoon thunderstorms are common in the summer. The winter and early spring months bring snow and sometimes cold temperatures to the highest elevations but frequent clear, sunny days. Winter brings moderate temperatures to the low elevations - a great time to recreate in these snow free areas - allowing both winter and summer type activities within very short distances.