Colorado is a hiker's heaven! With unsurpassed natural scenery, rugged mountains, deep canyons, alpine meadows, glaciers, and waterfalls, it's perfect for all kinds of outdoor activities: whitewater rafting, mountain biking, and rock climbing. The best time to visit Colorado is during the warm season which runs from June to October. In June, snow melts in the mountains, so it's a high time to hike in Rocky Mountain National Park, Mount Elbert, Mount Bierstadt, and drive through some of the highest passes in the state. In the summer, visitors can also see a unique phenomenon of fire rainbows and meet rare blood-shooting lizards. Winter months in Colorado are all about skiing, snowboarding, dog sledding, and exploring frozen waterfalls.