Biscuit Basin
Geysers in Biscuit Basin, Yellowstone National Park. SAPPHIRE POOL Temperature 200-202°F Dimensions 18x30 feet. Sapphire Pool, named for its blue, crystal-clear water and for its resemblance to an Oriental sapphire, was once a placid hot pool.
Biscuit Basin is part of the massive Upper Geyser Basin. To reach it, drive 2.0 miles north of the Old Faithful Interhchange, or 14.1 miles south of Madison Junction on the Old Faithful to Madison section of the Grand Loop Road.
Read MoreBiscuit Basin is part of the massive Upper Geyser Basin. To reach it, drive 2.0 miles north of the Old Faithful Interhchange, or 14.1 miles south of Madison Junction on the Old Faithful to Madison section of the Grand Loop Road.