Aspen is the quintessential year-round retreat—in the summer, vacationers go hiking or camping, and in the winter they go skiing. The small resort town is just as welcoming in the fall. Each year, Aspen trees turn the mountains from green to gold, shimmering underneath endlessly blue skies. Though the weather is crisp, it’s still nice enough to go hiking, biking, or horseback riding during the day. And in the evening, residents can head to their mountaintop vacation properties to sip hot chocolate and tea by crackling fires. This $36 million mansion offers 360-degree views of the tree-dotted mountainside—making it abundantly clear that there’s no bad time of year to be in Aspen.