Crater Lake National Park in Oregon is renowned for its deep blue lake formed within a volcanic caldera.

Crater Lake National Park, established in 1902, is Oregon's only national park and is famous for Crater Lake, the deepest lake in the United States at 1,943 feet. The lake was formed around 7,700 years ago after the collapse of Mount Mazama, a volcano in the Cascade Range. Its crystal-clear blue water and unique geological features, like Wizard Island, make it a major tourist attraction. Visitors enjoy hiking, boat tours, and scenic drives around the lake's rim. The park's pristine beauty and scientific significance in studying volcanic and ecological processes make it a treasured natural landmark in the Pacific Northwest.