Four days is a great way to sample some of the (limitless) things to do in Colorado! We recommend that you fly into Denver and find your accommodation there—this will be the “base camp” for your adventures. You could spend your first day on a guide-recommended hike in Rocky Mountain National Park, getting acclimated to Colorado’s beautiful flora and fauna.
If you happen to fall in love with trekking in the Rockies, you can spend the following three days hiking and camping in the scenic Thunder Lake. It’s a workout, but also one of the best ways to get in touch with Colorado’s wilderness. For some off-the-beaten-track options, there are plenty of guided hiking tours in Colorado to take you away from the mainstays.
Alternatively, you can spend two days perfecting your climbing skills on the Rockies’ majestic cliffs, finishing with a challenging, but rewarding hike up to the epic Longs Peak. The majestic views of the Rockies will serve as the perfect finale for your epic Colorado adventure.