Welcome to Crater Lake National Park, located in Southern Oregon on the crest of the Cascade Mountain range, 100 miles east of the Pacific Ocean. Crater Lake has inspired people for hundreds of years with its deep, blue lake, surrounding 2,000 foot high cliffs, two picturesque islands, and tumultuous volcanic past. It is a place of exceptional beauty, as it lies inside a caldera created when the Mount Mazama collapsed 7,700 years ago following a large eruption.