Union Peak Professional Guide
Detailed Trail Description from our Guidebook
"Crater Lake National Park is Oregon’s only national park. The centerpiece, Crater Lake, is one of the deepest lakes in the world. It is the caldera of the ancient volcano, Mount Mazama, and the peaks surrounding the lake are all that remains of the mountain. Union Peak, in the southwest corner of the park, is a volcanic remnant and was first climbed in 1862.
The Pacific Crest Trail provides the well-maintained approach for this scramble. Although the scramble is on a trail, the upper section of the mountain is loose and the trail is difficult to follow. Note that the Park Service completely rerouted the Union Peak Trail, a project lasting three years that was completed in late summer 2003."