Mountain towns are great places to be a dog, and Aspen’s one of the best. Here’s the inside line on pup-friendly hikes, off-leash areas, swimming holes, health and safety advice from a local veterinarian, hotels that cater to canine guests, and the best mountain breeds. We also introduce you to four local dogs and their humans who share unusually strong bonds. And make sure to read the “Be a Good Dog” section to your pooch; knowing where to go and how to behave when there—along with your diligence in picking up and packing out poop—will go a long way toward making sure everyone else likes your pup, too.