If you're looking to book a hotel for 18 year olds, you know your options are limited in Keystone, CO. Here are a list of hotels that will let someone 18, 19, or 20 rent a room. Policies can change abruptly so be sure to call the hotel ahead of time to verify your young age is not a problem for them. Hotel Ages is not responsible for hotels having different policies. You must call the hotel before booking to verify they can accomodate you.