Mark Udall , six days later , dies while on a hike in the Wind River Range . He appeared to be on the obscure , off-trail route that he had proposed to his family , '' the statement said . Searchers find his body in a remote area in Colorado . Sen. Randy Udall says it appears his brother died of natural causes .
Mark Udall , six days later , dies while on a hike in the Wind River Range . Searchers find his body in a remote area in Colorado . Sen. Randy Udall says it appears his brother died of natural causes .