Thielsen / Diamond Lake Loop is a 18-mile scenic route located in Oregon’s Umpqua National Forest. The route begins (and ends) at Diamond Lake and traverses east towards Mount Thielsen through the Mount Thielsen Wilderness. The loop covers relatively gentle terrain through peaceful pine forests and scenic alpine meadows. It is rated as easy to moderate and can be completed as a long day trek or part of an overnight camping trip.
The route starts at the Howlock Mountain Trailhead, which provides easy access to Mount Thielsen Wilderness. At the trailhead, there are also two developed campsites for hikers and horseback riders.
Along Howlock Mountain Trail, the loop heads east through lodgepole pine forest. The trail passes Timothy Meadow, enters Thielsen Wilderness, and ultimately joins the Pacific Crest Trail (PCT).
PCT leads south towards Mount Thielsen, a prominent jagged peak in the southern Cascade Mountain Range. Its jagged spire stands out among nearby mountains as it rises 9,182 feet above sea level.
The trail skirts around the base of the west side of the mountain and intersects with Mount Thielsen Trail #1456. Follow the Mount Thielsen Trail #1456 west to the Spruce Trail, and then follow the Spruce Trail north back to the Howlock Mountain Trail. From the junction with Howlock Mountain Trail, retrace your steps back to the Howlock Mountain Trailhead and Diamond Lake.
PASSES AND PERMITS
Certain trailheads within Umpqua National Forest require a pass and/or permit. For detailed information please visit https://www.fs.usda.gov/main/umpqua/passes-permits/recreation.
ADDITIONAL INFORMATION
Howlock Mountain Trailhead
Diamond Lake Resort
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