According to a recent study conducted by the US Geological Survey and Portland State University, most of the glaciers present in the Montana’s Glacier National Park are disappearing or shrinking at a very faster rate. The glacier recession model predicts a no glacier zone in these areas by 2030.
Reference Link: http://www.npr.org/sections/thetwo-way/2017/05/11/527941678/disappearing-montana-glaciers-a-bellwether-of-melting-to-come