Important Reminder:The Foursquare City Guide app officially sunset on December 15, 2024, with the web version following in early 2025. However, your check-in journey doesn’t end here! Join us on Swarm, where new adventures await.
Colorado: With a network of trails to suit every level of hiker, get up-close with the Flatirons (the slanting slabs of sandstone that are Boulder’s most recognizable landmark) framed by a beautiful meadow.