Bird Watching#Hiking#Hot Spring#Photography#Walking#Wilderness#Wildlife ViewingGeyser#National Recreation Areadbo2026-05-19T17:01:34Castle Geyser is located just north of Old Faithful Inn.144.463822-110.834100Yellowstone National ParkYellowstone National ParkWYPO Box 16882190Castle 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. 307-344-7381SummerYellowstone National Park96311|http://www.visitmt.com|Y#11|http://www.wintermt.com|Y#32|http://www.lewisandclark.state.mt.us|Y#94|http://indiannations.visitmt.com|Castle GeyserYELLOWSTONEYellowstoneGeyserhttp://www.nps.gov/yell