Fodor's Expert Review Geyser Hill Loop
Along the easy 1.3-mile Geyser Hill Loop boardwalk, accessed from the Old Faithful Boardwalk, you'll see active thermal features such as violent Giantess Geyser. Erupting only a few times each year (but sometimes going quiet for several years), Giantess spouts from 100 to 250 feet in the air for five to eight minutes once or twice hourly for a few to as long as 48 hours. Nearby Doublet Pool's two adjacent springs have complex ledges and deep blue waters that are highly photogenic. Starting as a gentle pool, Anemone Geyser overflows, bubbles, and finally erupts 10 feet or more, every three to eight minutes. The loop boardwalk brings you close to the action, making it especially fun for kids.