From towering alpine peaks and ancient cliff dwellings to massive sand dunes and dramatic canyon walls, Colorado's four national parks showcase just how wildly diverse the state can be. This guide covers Rocky Mountain National Park, Mesa Verde National Park, Great Sand Dunes National Park, and Black Canyon of the Gunnison National Park, with a mix of must-see sights, scenic drives, memorable hikes, and roadside stops to help you make the most of each adventure.