"Grand Geyser" Top 5 Page for this destination Geysers/hot springs Tip by GuthrieColin
Geysers/hot springs, Yellowstone National Park: 201 reviews and 498 photos
Grand Geyser is the tallest predictable geyser in the world. Its eruptions occur every 7-15 hours. For eruption times check at the Old Faithful Visitors Center or hike to the geyser and read the prediction sign which is updated daily. It is a fountain type geyser unlike Old Faithful its eruption is more fan-like than column-like. The eruption comes in spurts rather than a constant flow.
Each eruption lasts from 9-12 minutes and can have multiple bursts where the flow will stop entirely and then suddenly start again, sometimes having 4 or more of these stagnant periods. The main drawing card here is the height that the water is thrown into the air. It consistently reaches heights of 160 feet (48m) and has been known to reach 200 feet (60m).
There are two other geysers that share the same subterranean plumbing in the Grand Group, Turban and Vent Geysers. The more active Turban Geyser erupts every 15 to 22 minutes. Each eruption of Grand Geyser occurs at the onset of one of Turban's eruptions. Geyser hunters will undoubtedly be scouting out this monster and when each eruption of Turban Geyser begins they will become frantic hoping it's the one that will begin Grand's eruption. Upon the eruption of Grand Geyser the third geyser will come to life. It shoots water to 75 feet (23 m) and will sometimes continue to erupt for an hour after Grand has stopped.
There will likely be many of the hardcore Geyser hunters that I was speaking about. They scout out the geysers and intend to see every erruption. If you happen to be waiting for an eruption for any length of time these very knowledgeable people will likely start telling stories of the best eruptions they have seen and when a certain irregular geyser last erupted. Listen in on their conversations for more info and ask them for tips on what other geysers may be erupting soon. They will have the most recent information on current trends and they may even suggest what ones you would be likely to see during your visit.
Directions: A short walk from the Old Faithful Visitors Center past Castle up the boardwalks.
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