Eruptions of Lion Geyser
are accompanied by a loud roaring sound, hence its name. The geyser is active on average for between 1 and 7 minutes each day, sending water up to 100 feet high. Activity is quite variable, however, as are the quiet intervals, which range from 6 hours to several days. Lion is the largest of a group of four adjacent, interconnected geysers, the others being Lioness, Big Cub and Little Cub; all are surrounded by a wide, low mound of hard, fairly smooth geyserite, built up over many centuries. Of the others only Little Cub (on the south side of the mound) is currently active.
Back to map of the Upper Geyser Basin