found: Work cat.: Warning sign at Tipsoo Lake, eastern border of Mount Rainier National Park, n.d., via the Dwight Watson digital images collection, Apr. 9, 2008.
found: GNIS, Apr. 9, 2008(Tipsoo Lake, lake, Wash., Pierce Co., 46°52ʹ09ʺN 121°31ʹ01ʺW; also Tupso Lake in Snohomish County and Lake Tupso in Skagit County)
found: Washington place names, via WWW, Apr. 9, 2008(Tipsoo Lake: An 8-acre lake in Tipsoo Basin, elevation 5,314 ft., east and above Cayuse Pass west of Chinook Pass, is on the eastern border of Mount Rainier National Park. It has been spelled Tupso and Tipso, but the present spelling is official.)
