A search was under way Tuesday for a 25-year-old Colorado man overdue from what was expected to be a one-day trek into the backcountry of Rocky Mountain National Park, though high winds and blowing snow were hampering efforts.

Every now and again, nature rises up and lets you know you didn't build something in the right place, or sturdy enough. At Rocky Mountain National Park, that message came through clearly in September 2013 when torrential rains spawned massive flooding that erased parts of some trails. Now park officials are wondering how best to reroute and repair those trails.

Looking for something to do in the National Park System in November and December? Check out this listing of activities, from Andersonville National Historic Site to Yoemite National Park.

Yellowstone National Park Superintendent Dan Wenk, who was able to end years of litigation over a winter-use plan for the park, has been honored by the National Parks Conservation Association for his achievements during a nearly four-decade career with the National Park Service.