found: Work cat.: Booker Mountain viewed from Park Creek Pass looking south, n.d., via the Dwight Watson digital images collection, Mar. 5, 2008notes (Mt. Booker)
found: GNIS, Mar. 5, 2008(Booker Mountain, summit, Chelan County, Wash., 48°28ʹ31ʺN 120°58ʹ45ʺW, elev.: 8120 ft./2475 m.)
found: Washington place names, via WWW, Mar. 5, 2008(Booker Mountain; elevation 8300 feet; between the Stehekin River and Park Creek in the southern unit of North Cascades National Park in Chelan County)
found: Peakbagger.com, Mar. 5, 2008(Booker Mountain, Washington, Chelan County, 48°29ʹN 120°59ʹW; Cascade Range, North Cascades, Central North Cascades, Buckner-Boston Massif)