In the 1850s, Grinnell Glacier covered more than 700 acres and was over 1,000 feet thick, but today has dwindled to less than 150 acres. In 1850 the ecosystem had over 150 named glaciers, but today only 35 remain, 25 of which are considered active. At the current rate of climate change, all of the park’s remaining glaciers will vanish by 2030, hence this image’s title.

Don’t forget to check out this photo’s vertical variant, “Grinnell Glacier”