Colorado Life Zones

Photo credit: By John Holm from Leadville, CO, USA - tundra on Spaulding Ridge, CC BY 2.0, Alpine tundra Copper Mountain Colorado​ 

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Photo credit: By Ghislain118 (AD) http://www.fleurs-des-montagnes.net (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons