We rank the 21 Best Mountain Towns to Visit in the USA. See which places our readers like the best, and vote for your ...

As Lancaster County baked in sweltering heat two weeks ago, with temperatures holding steady for days in the upper 90s, fields of snow covered north-facing slopes high in the Rocky Mountains. Rocky ...

Rocky Mountain National Park is one of the highest national parks in the country, with an elevation that spans from 7,600 feet above sea level to 14,259 feet (or almost three miles) above sea level.

One sunny July morning, on a lake in Colorado’s San Juan Mountains, two scientists skimmed a black inflatable raft back and forth across the water. Isabella Oleksy, an ecologist at the University of ...