found: Work cat.: Gargoyle Ridge near Hidden Lake Peaks vicinity, n.d., via the Dwight Watson digital images collection, Mar. 7, 2008notes ("More rock combinations along the ridge from Hidden Peak vicinity towards Eldorado. Elevation ca. 6500 feet")
found: GNIS, Mar. 7 2008(Eldorado Peak, summit, In the Cascade Range in North Cascade National Park, at the head of Marble Creek and W of Inspiration Glacier, 27 mi E of Concrete, Skagit County, Wash., variants: Hidden Lake Peaks, Hidden Lakes Peaks, 48°32ʹ15ʺN 121°08ʹ03ʺW; elev. 8861 ft./2701 m.; variant name Hidden Lake Peaks conflicts with another peak in Skagit County with same name)
found: Washington place names, via WWW, Mar. 7 2008(Eldorado: "This imposing peak, elevation 8,875 feet, is in Mt. Baker Snoqualmie National Forest in northeast Skagit County. It is girdled with large glaciers on all sides. During the 1890s, the name was given to reflect the hoped for riches to be taken from local mining claims including Skagit Queen mine"; in entry for Hidden Lake Peaks: Eldorado Mountain)
found: Peakbagger.com, Mar. 7 2008(Eldorado Peak, Washington, 48°32ʹN 121°8ʹW, Skagit County, Cascade Range, North Cascades, Central North Cascades, Eldorado Massif (highest point))
