Erosion has produced many rugged cliffs and steep slopes which have brightly colored exposed soils and rocks.

The majority of the south and west-facing slopes of the Galiuro Range are covered with dense stands of manzanita, live oak, mahogany and other brush species.

The higher slopes and ridgetops have moderate to dense stands of juniper, pinon pine, and oak trees.

[2][3] A variety of wildlife can be found in the Galiuro Wilderness, including large mammals such as desert mule deer, pronghorn, desert bighorn sheep, Coues’ white-tailed deer, collared peccary, Mearns coyote, New Mexico black bear, and North American cougar.

Smaller mammals include desert cottontails, ground squirrels, raccoon, white-nosed coati, foxes, skunks, and bobcat.

[2][3] Original native inhabitants of the area are believed to be the Jacome Indians, a little-known group possibly related to the Apaches.

Just before dawn on February 10, as he was preparing breakfast, Jeff heard two of their horses gallop by their dogs began barking.

Marshal Haynes escaped to nearby Klondyke, Arizona, while the Power boys and Tom Sisson fled south to Redington on the San Pedro River.

[4] In January 1943, a World War II B-24 bomber on a training run crashed near the summit of Bassett Peak, killing all eleven men on board.

His father, Russell Sisson, was a Union veteran of the Civil War, having served as a Private in Company H of the 57th Pennsylvania Infantry.

However, after the Kelvin Grade Massacre, the 1st Cavalry was sent to Fort Grant, Arizona to pursue the Apache Kid, who was never captured.

[8] Although the United States Marshal's wanted poster indicates that Sisson was a "paroled convict", there is currently no documentation regarding his involvement in any criminal activity prior to the gunfight at the Power's Cabin in February 1918.

As incredible as it may seem, in 1932 Sisson, who had then been in prison for fourteen years, received a pension for his military service from the United States Government.