Iconic Yellowstone
Caldera Landscape
Mammoth Hot Springs
Travertine Terraces at Mammoth Hot Springs
Pool
Thermophilic Algae Do Well at 100-133F Norris Geyser Basin
Iron-rich Thermophile Bacteria Thrive at 122-140 Porcelain Basin
Porcelain Basin
Old Faithful - Every 35-120 minutes and 90-180 Feet in Elevation
Find the Unmarked Trail to Get Above Grand Prismatic Spring
Come Close…..