Their lands lay within the Yakima Rivers (in Yakama: Tapteal - ″rapids″ because of the waterfalls at Prosser, Washington) watershed and for the most part east of the Cascade Range, to the south along the northern tributaries of the Columbia River (in Yakama: Nch'i-Wána - ″great river″) (here the Yakama bands frequently lived in bilingual villages together with Southern/Columbia River Sahaptin-speaking bands: Umatilla, Skin-pah/Skin, Tenino/Warm Springs), to the southwest along the Lower Snake River and Columbia River (here the Yakama bands lived also in bilingual villages together with Lower Snake River Sahaptin-speaking local groups of Chamnapam/Chem-na-pum, Wauyukma and Naxiyampam), to the northeast their tribal territories ranged up to the Wenatchee River (because of frequently intermarriages some of the originally Interior Salish-speaking Wenatchi bands switched to Sahaptin as first language), in the north to the lakes of Cle Elum Lake (after the Upper Yakama / Kittitas name Tie-el-Lum, meaning swift water, referring to the Cle Elum River), Kachess Lake (more fish) and Keechelus Lake (few fish) at the headwaters of the Yakima River (with the directly northwest living Coast-Salish-speaking Snoqualmie the Yakama bands kept family ties), in the west across the Cascade Range to the headwaters of the Cowlitz River (shch'il), Lewis River ((wl'ɫt'kh) and White Salmon River (where there were also family ties with Coast-Salish-speaking Lower Cowlitz and Upper Chinookan/Kiksht-speaking Wasco-Wishram).