[2] The Warner crest divides waters that flow west into the Sacramento/Pit River drainage, and east into the Great Basin alkali lakes of Surprise Valley.

The eastern side of the wilderness is a steep, abrupt escarpment of volcanic terrain of cliff bands and terraces.

Heavily forested, steadily rising slopes furrowed by several drainages such as Mill Creek.

[4] The landscape of today is not from mountain building but from the forces of erosion such as wind, water, and past glaciation.

A notable rare shrub is the native western black currant (Ribes hudsonianum var.

[6] Dramatic views from the crest include Mount Shasta in the west, Modoc Plateau to the north, Surprise Valley in the Great Basin in the east and in the south, the Sierra Nevada range.

The Forest Service and many organizations encourage the practice of Leave No Trace principles of outdoor travel to minimize human impact on the environment.