Lion Geyser, Geyser in Upper Geyser Basin, Yellowstone National Park, United States.

Lion Geyser is a cone-type geyser in the Geyser Hill complex of Upper Geyser Basin, Yellowstone National Park. It is the largest of the Lion Group, which also includes Little Cub Geyser and the currently inactive Big Cub and Lioness geysers. Its eruptions throw water to 90 feet (27 m) and last from 1 to 7 minutes.

Lion Geyser is a cone-type geyser in the Geyser Hill complex of Upper Geyser Basin, Yellowstone National Park. It was named for the roaring sound of steam released during an eruption. It is the largest of the Lion Group, which also includes Little Cub Geyser and the currently inactive Big Cub and Lioness geysers.

The name comes from the roaring sound of steam released during an eruption, which early visitors compared to a lion. Lion is the largest of the Lion Group, which also counts Little Cub Geyser and the now-inactive Big Cub and Lioness geysers.

Lion Geyser sits in the Geyser Hill complex of Upper Geyser Basin, reached by the basin's boardwalk trail. Stay on the boardwalk and keep back from the cone, since eruptions send steam and water to 27 m and last 1 to 7 minutes. Check the predicted eruption window before waiting, as the interval between eruptions is long.

During eruptions, the geyser produces a distinctive roaring sound that echoes across the basin and helps distinguish it from the connected geysers nearby. This loud vocalization made it memorable to early visitors and helped explorers identify the feature from a distance.