Spring, Geyser sights in Rocky Mountains
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You can feel the tension build as you wait for an eruption of Old Faithful - not the biggest, not the most frequent, but easily the most iconic geyser in the park. Erupting every 90 minutes, Old Faithful spouts some 30,000L (8000 gallons) of water up to 55m (180ft) in the air. Tip: the first thing to do when you arrive is to check the predicted geyser eruption times at the visitor center and then plan your explorations around these.