Ben Grogan:
Bison by a steam vent
Ben Grogan:
Yawning
Ben Grogan:
The Yellowstone Lower Falls
Ben Grogan:
Steam Vents
Ben Grogan:
Green River
Ben Grogan:
Waterfall
Ben Grogan:
Yellowstone Elk
Ben Grogan:
Crossing the road in front of us
Ben Grogan:
Yellowstone vents
Ben Grogan:
Mud pool
Ben Grogan:
Sleeping Bison
Ben Grogan:
Bison on the hill