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2025 Hazard Mitigation Plan <br />Kittitas County, Washington <br />Table 4-129. Volcanoes Within 1,000 Miles of Kittitas County <br />Figure 4-22 illustrates the location of volcanoes within 100 miles of Kittitas County. The four (4) major <br />volcanoes relatively close to Kittitas County are: <br />. Glacier Peak (approximately 80 miles north northwest of the City of Ellensburg) <br />. Mount Rainier (approximately 58 miles west of the City of Ellensburg) <br />. Mount St Helens (approximately 95 miles southwest of the City of Ellensburg) <br />. Mount Adams (approximately 70 miles southwest of the City of Ellensburg) <br />Mount Hood constitutes a low hazard because of distance, direction of prevailing winds, and evidence <br />that its previous ash eruptions were confined to its immediate vicinity. <br />Very HighMount Baker Whatcom County, <br />Washinqton 10,781 Stratovolcano 6,700 years <br />aqo <br />Glacier Peak Snohomish County, <br />Washinqton 10,541 Stratovolcano 1,100 years <br />aqo Very High <br />Mount Rainier Pierce County, <br />Washinqton 14,410 Stratovolcano 1,000 years <br />aqo Very High <br />Mount St. Helens Skamania Gounty, <br />Washinoton 8,330 Stratovolcano 1980 <br />2004 -2008 Very High <br />Mount Adams <br />Skamania and <br />Yakima counties, <br />Washington <br />(Yakama Naflons R€serve) <br />12,277 Stratovolcano 3,800 years <br />ago High <br />Clackamas and <br />Hood River <br />counties. Oreoon <br />11,240 Stratovolcano 1865 AD Very HighMount Hood <br />Mount Jefferson <br />Jefferson, Linn, and <br />Marion Counties, <br />Oreqon <br />10,495 Stratovolcano 15,000 years <br />ago <br />LowA/ery <br />Low <br />Three Sisters Lane County, <br />Oreqon 10,358 Complex <br />Volcano <br />2,000 years <br />aoo Very High <br />Shield 1,300 years <br />ago VeryNewberry Volcano <br />Deschutes, <br />Klamath, and Lake <br />counties, Oreqon <br />7,986 <br />Crater Lake Klamath County, <br />Oreqon 8,1 59 Caldera 6,600 years <br />aqo Very High <br />Composite 950 years ago HighMedicine Lake Volcano Siskiyou and Modoc <br />counties, California 7,913 <br />Mount Shasta Siskiyou County, <br />California 14,163 Stratovolcano 3,200 years <br />aqo Very High <br />Shasta County, <br />California 10,456 <br />Dome Field, <br />Volcanic <br />Field <br />1914 - 1917 Very HighLassen Peak <br />Elevation <br />(feet) <br />Threat <br />PotentialNameLocationTypeMost Recent <br />Eru n <br />Chapter 4: Hazard ldentification and Risk Assessment 177