Hikes›United States›Oregon›Mount Jefferson Wilderness›Triangulation PeakTriangulation PeakDay hike · 18 km · ↑ 862 mIn Mount Jefferson Wilderness, OregonMore about Triangulation Peak (3)5/8/2026robshikingdiary.com · May 2026 · trip reportTriangulation Peak Activation (9.4.2013)pnwsota.org · trip reportPortland: Triangulation Peakbackpacker.com · trail guide