Boulder - Bonanza Group

The Boulder - Bonanza Group is a lead mine located in Bear Lake county, Idaho at an elevation of 7,100 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: Boulder - Bonanza Group  

State:  Idaho

County:  Bear Lake

Elevation: 7,100 Feet (2,164 Meters)

Primary Mineral: Lead

Lat, Long: 42.2553, -111.49610

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 Boulder - Bonanza Group

Boulder - Bonanza Group MRDS details

Site Name

Primary: Boulder - Bonanza Group


Primary: Lead
Secondary: Silver


State: Idaho
County: Bear Lake
District: Bear Lake District

Land Status

Land ownership: National Forest
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.
Administrative Organization: Cache National Forest


Not available


Type: Underground


Not available


Not available


Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Year First Production: 1913
Discovery Method: Ore-Mineral Not In Place
Years of Production:
Significant: N
Deposit Size: S


General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains
Physiographic Detail: Wasatch Mountains

Mineral Deposit Model

Not available




Not available


Alteration Type: L
Alteration Text: Fe Stains


Name: Limestone
Role: Host
Age Type: Host Rock
Age Young: Late Cambrian

Analytical Data

Not available


Ore: Galena
Gangue: Jasper
Gangue: Calcite
Gangue: Dolomite


Comment (Location): About 1 Mi N And E Of Hummingbird

Comment (Geology): Ute Limestone Is Host, But Mine Workings May Extend Into Blacksmith Limestone

Comment (Location): On Steep Eastward Facing Slope

Comment (Production): Production Totaled 1 Carload

Comment (Reserve-Resource): Material Above On Dump


Reference (Deposit): Mansfield, G. R., 1927 , Geography, Geology, And Mineral Resources Of Part Of Southeastern Idaho: USGS Prof. Paper 152 , P. 344

Reference (Deposit): Richards, R. W., 1911 , Notes On Lead And Copper Deposits In The Bear River Range, Idaho And Utah: USGS Bulletin 470 , P. 177 - 187

Reference (Deposit): 1911 Recon R. W. Richards, Bulletin 470

Reference (Deposit): 1927 Recon G. R. Mansfield, Prof. Paper 152

Reference (Production): Mansfield, G. R., 1927 , USGS Prof. Paper 152 , P. 344

Idaho Gold

Where to Find Gold in Idaho

"Where to Find Gold in Idaho" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Idaho. Read more at Where to Find Gold in Idaho.