Visit a land where fire and ice combined to create a remarkable landscape, with breathtaking sapphire blue water, primeval moss-covered forests, awesome lava formations, and waterfalls at every bend. Mount Mazama exploded 7,700 years ago, shooting a giant pillar of ash and pumice thirty miles high. The mountain collapsed in on itself, and over the centuries the red-hot volcano cooled and filled with pure snow and rain, creating one of the clearest, deepest lakes in the world. But Crater Lake is only part of the show. This gem of the Cascade Volcanic Arc is surrounded by much more.