Mount Hood Wilderness is a 64,742-acre protected area in Oregon within Mount Hood National Forest, encompassing Mount Hood’s summit and upper slopes across terrain that ranges from temperate rain forest to glaciers and rocky ridges. Known for containing America’s most visited snowclad summit, it draws more than 10,000 climbers each year and also offers extensive hiking, including the 41-mile Timberline Trail and sections of the Pacific Crest Trail. Visitors face fast-changing weather, steep volcanic slopes, and hazardous stream crossings. Wilderness regulations require permits and climber registration near the summit while prohibiting roads, logging, mining, and vehicles to preserve low-impact recreation and wild landscapes.