For 150 days, I hiked from Mexico to Canada on the Pacific Crest Trail. From April 17th to September 13th, the ULA Circuit sat "comfortably" on my back, in a plethora of conditions and terrain. Despite having to carry extra water in the desert, a bear can in the Sierra, and extra rain protection in Washington. The pack lasted the entire hike with some wear and tear associated with extreme, and continuous use. It is ready for another long hike, after some needed, but easy repairs.