Recently Rocky Mountain National Park has been requiring a timed-entry permit. Check their website for details and to make your reservation or call the YMCA hiking desk for questions 970-586-3341 ext 1311. (https://www.nps.gov/romo/planyourvisit/timed-entry-permit-system.htm) Activities at the Y open two weeks in advance. If there is a program or activity that you know you want to do, you can make a reservation before you arrive online or by calling 970-586-3341 ext 1104. Some activities are first-come-first-serve, including the swimming pool, museum, craft shop and library. There are many non-guided programs such as mini golf, the Outdoor Classroom, and hiking trails.