Mammoth Hot SpringsYellowstone National Park© Catherine Moore
Bull Elk River BattleYellowstone National Park, Wyoming© Barbara Magnuson/Larry Kimball
Emerald Hot SpringYellowstone National Park© Catherine Moore
Evening Round-UpWyoming© Robb Waterman
Grizzly Bear YearlingWyoming, Yellowstone National Park© Barbara Magnuson/Larry Kimball
Grizzly SowWyoming, Yellowstone National Park© Barbara Magnuson/Larry Kimball
Grizzly Sow 2Wyoming, Yellowstone National Park© Barbara Magnuson/Larry Kimball
GroundhogWyoming© Trudy Smuin
SunriseGrand Tetons/Snake River, Wyoming© Jamie Krueger
Grand Teton National ParkGrand Teton National Park© Catherine Moore
Mammoth Hot SpringsMinerva Terrace; Yellowstone National Park, Wyoming© Dharmesh Desai
FireweedYellowstone National Park, Wyoming© Daniel J. Cox, NaturalExposures.com
Roadside WarriorsWyoming, United States© Catherine Moore
Jackson HoleWyoming© James Morehouse
ChipmunkWyoming© Trudy Smuin
Devil's Tower© Lezle Williams