Norris Geyser Basin
Grand Loop Road at Norris, Yellowstone National Park, WY
About
Norris is outside the Yellowstone Caldera, but inside the first and largest caldera. Norris Geyser Basin is one of the hottest and most dynamic of Yellowstone's hydrothermal areas. Many hot springs and fumaroles have temperatures above the boiling point (200°F) here. Water fluctuations and seismic activity often change features.