A Northern Pacific Railway station at the future site of the city of Cle Elum was named Clealum after the Kittitas name Tie-el-Lum, meaning "swift water", referring to the Cle Elum River.
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According to Peakbagger.com the Wenatchee Mountains are defined as bounded by U.S. Route 2 from Stevens Pass to Wenatchee on the Columbia River, then down the Columbia River to Interstate 90, then west along the highway to the vicinity of Cle Elum and Roslyn, then north along Cle Elum Lake and the Cle Elum River and north to Stevens Pass.