Indian Heaven Wilderness is a federally protected area in southwestern Washington within Gifford Pinchot National Forest, covering 20,782 acres of forested volcanic plateau with meadows, small lakes, marshes, and lava-shaped landforms. Known to Native peoples as Sahalee Tyee, it has remained culturally important for thousands of years as a place for berry picking, fishing, and hunting, with huckleberry meadows shaped in part by intentional burning. Its volcanic field includes about 60 eruptive centers, with Big Lava Bed formed about 8,200 years ago. Today it is known for wildlife, huckleberry fields, mountain views, and trails including the Pacific Crest National Scenic Trail.