Black Pool at West Thumb Is Bright Blue in Color - 3
Steam
Steam can be seen on the surface of the Black Pool even in the summer.

Black Pool
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Photo © Vacation Idea.com

Yellowstone Vacation

Yellowstone Lake
West Thumb Geyser Basin
Central Basin
West Thumb Trail
Black Pool
South Entrance
Lewis River
Yellowstone Vacation: Lewis Lake
Yellowstone Vacation: Abyss Pool
Yellowstone Vacation: Big Cone
Fishing Cone
Lakeshore Geyser
Lakeside Spring
Bluebell Pools
Thumb Paint Pots
Moose Falls
Famous Geysers of Yellowstone
Yellowstone Lodging
Yellowstone Vacation Tips
Yellowstone Weather