COGenWeb Project is a free genealogical site about the history
of Colorado. We hope you find helpful clues for your research of
Colorado ancestors.
Please consider contributing your pieces of Colorado family history. Corrections, updates, and additions to this site are always welcome. Our combined efforts can make this a great site for all who visit!
State Coordinator: Rebecca Maloney
Assist State Coordinators: Betty Baker and M.D. Monk and Norma Hass
County Coordinator: YOU! Available for Adoption
Custer County, Colorado, was formed on March 9, 1877, by the Colorado
Legislature from the southern part of Fremont County, named for Lt. Col. George
Armstrong Custer, who died the previous year. Its formation was spurred by a
silver rush in the Wet Mountain Valley, leading to boomtowns like Rosita and
Silver Cliff, with the county seat eventually settling in Westcliffe in 1928
after mining declined and ranching became dominant.
Key Events in Formation
& Early History:
1870s: German colonists settled the Wet Mountain Valley,
followed by prospectors discovering silver and copper, initiating a mining boom.
1874: Copper and silver discoveries near present-day Rosita fueled the demand
for a new county.
March 9, 1877: The Colorado Legislature officially created
Custer County.
County Seats: Ula was the first seat, followed by Rosita, then
Silver Cliff, with Westcliffe becoming the permanent seat in 1928.
Boom &
Bust: The silver rush brought rapid growth, but mines exhausted, leading to
population decline and a shift to cattle ranching, a primary industry today.
Legacy:
The county's history reflects typical Colorado "boom and bust"
cycles, with its rugged terrain now known for ranching and stunning mountain
views.
We thank our previous County Coordinators for all the work they put into making this site great!
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This page was last updated 01/31/2026