| Activities | Bird Watching#Hiking#Hot Spring#Photography#Walking#Wilderness#Wildlife Viewing |
| AltSiteTypes | Geyser#National Recreation Area |
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| CreatedBy | dbo |
| DateCreated | 11/3/2025 5:01:39 PM |
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| Directions | Castle Geyser is located just north of Old Faithful Inn.1 |
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| Latitude | 44.463822 |
| Longitude | -110.834100 |
| MailingCity | Yellowstone National Park |
| MailingFirm | Yellowstone National Park |
| MailingState | WY |
| MailingStreet | PO Box 168 |
| MailingZip | 82190 |
| NetDescriptions | Castle Geyser has the largest cone for a cone-type geyser (120 feet around) and looks like the ruins of an old castle tower. It erupts to heights from 60 to 100 feet and lasts about 20 minutes. A noisy steam phase follows that lasts for 30 to 40 minutes. Eruptions occur about every 10 to 12 hours. This geyser could be the oldest geyser in the basin.
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| PhoneNo1 | 307-344-7381 |
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| SeasonOfOp | Summer |
| ServiceCity | Yellowstone National Park |
| SiteId | 9631 |
| SiteMembers | 1|http://www.visitmt.com|Y#11|http://www.wintermt.com|Y#32|http://www.lewisandclark.state.mt.us|Y#94|http://indiannations.visitmt.com| |
| SiteName | Castle Geyser |
| SiteRegion | Yellowstone |
| SiteRegMem | YELLOWSTONE |
| SiteType | Geyser |
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| Url | http://www.nps.gov/yell |