Crater Lake is a beautiful, deep blue lake located in south-central Oregon in the United States. It is the deepest lake in the United States and is known for its clear, blue waters and stunning views. The lake was formed around 7,700 years ago when a volcano called Mount Mazama collapsed and created a caldera. The lake is now a popular destination for tourists, hikers, and outdoor enthusiasts, and is surrounded by Crater Lake National Park. The park offers a variety of recreational activities, including hiking, fishing, and sightseeing, as well as educational programs and guided tours.