Honestly, I didn’t know there was any skiing in Glenwood Springs until last summer when we went to explore. Up top, at the Glenwood Caverns, our guide told us about how the town was a great place for families—with year-round activities—and how his own kids had learned to ski “up at Sunlight.” Our eyes followed in the direction he was pointing, up beyond the red, iron-rich hills to the thickly wooded mountains above. And we thought, Someday, that’d be fun to see. So we were excited to be invited sooner than later, to experience the Ski Swim Stay package (starting at $89 per person) that’s offered widely in Glenwood. And we came away thinking it was a package we could recommend to anyone. Our family drove up on a Thursday, and enjoyed no traffic, which got us there in under three hours (from...