The coal mines of Colorado’s northern fields

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The northern coal fields operated between 1859 and roughly the early 1960s. These early mining operations were one of the primary drivers of Latino immigration to Boulder County at the end of the 19th and beginning of the 20th century.

At one time, there were more than 100 coal mines spanning the region, from the southern edge of Boulder near Marshall Road east to Superior, Louisville, Lafayette, Erie, Frederick, Firestone and Dacono.

A search of the Western History and Genealogy section of the Denver Public Library revealed the names of the following coal mines in Boulder and western Weld Counties.

Coal mines in Boulder County

Acme

Archer

Big Lake

Black Diamond

Boulder

Boulder Valley

Caledonia

Cannon

Capitol

Centennial

Columbia

Cracker Jack

Fox

Gladstone

Globe

Gorham

Hecla

Hi-way

Industrial

Jewell

Leader

Marshall

Marshall No. 2

Marshall No. 3

McGregor

Mitchell

Monarch No. 1

Monarch No. 2

Montgomery

New Baker

New Centennial

New Morrison

Nonpareil

Paramount

Parkdale

Pittsburg

Pluto No. 1

Pluto No. 2

Red Ash

Regal

Rex No. 1

Rex No. 2

Simpson

Standard

State

Stewart

Sunnyside

Vulcan

Boulder County mines that may have mined coal or other minerals, such as gold

B&M

California

Cardiff

Crown

Eclipse

Glendale

Hartman

Ingram

Logan

Matchless

Summit

White Crow

Coal mines in Weld County

Baum

Clayton

Columbine

Eagle

Eureka

Evans

Farmers

Firestone

Galeton

Golden ash

Graden

Grant

Imperial

Morrison

Puritan

Russell

Shamrock

Sterling

Washington

Wellington

Witherbee