Mark Udall , 34 , dies while on a hike in the Rocky Mountains . Searchers find his body in a remote area in Montana . Colorado Sen. Mark Udall 's brother died on a hiking trip in the Rocky Mountains , officials said . Detective Mark Warner says it appears his brother died of natural causes .
Mark Udall , 34 , dies while on a hike in the Rocky Mountains . Searchers find his body in a remote area in Montana . Detective Mark Warner says it appears his brother died of natural causes .