[4] Origins of the mountain begin in around 40 million years ago during the Eocene age when sandstone and siltstone formed in the region consisting of parts of the Northern Oregon Coast Range.

Other sedimentary rock in the area formed more recently, around 20 million years ago.

[8] Surrounding the mountain are forests of western hemlock and Douglas fir trees.

Fauna in the area include a variety of birds such as hermit warbler, sooty grouse, chestnut-backed chickadee, golden-crowned kinglet, Steller's jay, and Pacific-slope flycatcher.

From mile post 33 on Oregon Route 6 near Lees Camp, access is via Saddlemountain Road.