El Dorado Bar

The El Dorado Bar is a sapphire and gold mine located in Lewis and Clark county, Montana at an elevation of 3,681 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: El Dorado Bar  

State:  Montana

County:  Lewis and Clark

Elevation: 3,681 Feet (1,122 Meters)

Commodity: Sapphire, Gold

Lat, Long: 46.7228, -111.84390

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Satelite image of the El Dorado Bar

El Dorado Bar MRDS details

Site Name

Primary: El Dorado Bar
Secondary: Eldorado Bar


Primary: Sapphire
Primary: Gold


State: Montana
County: Lewis and Clark
District: Missouri River

Land Status

Land ownership: Unknown
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.


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Owner Name: Sam Speerstra
Home Office: Montana
Info Year: 1990


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Record Type: Site
Operation Category: Producer
Operation Type: Placer
Mining Method: Alluvial Mining
Milling Method: Washing
Discovery Method: Ore-Mineral In Place
Years of Production:
Significant: N
Deposit Size: M


General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains

Mineral Deposit Model

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Analytical Data

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Reference (Deposit): MBMG, MEMOIR 26, 1948, PP. 68-69.

Colorized Mining Photos

Drumlummon Mine at Marysville, Montana late 1880s

Western Mining History's collection of colorized mining photos includes incredible scenes from Montana: Best Historical Photos: Colorized Mining Scenes.