CoorsTek celebrates 100 years in Golden.
May 1, 2010
Basket handled 6th Avenue Bridge moved into place in Lakewood: the largest object ever moved within Jefferson County. Curving 17-span Indiana Bridge completed the same year at Golden, both part of West Corridor light rail project.
St. Anthony West Hospital, Jefferson County’s first major hospital built from scratch in a century, completed in Lakewood.
November 18, 2011
Jefferson County’s Sesquicentennial Gala held at Jefferson County Fairgrounds.
- James Baugh House at 11361 W 44th Avenue in Wheat Ridge listed on the National Register of Historic Places. One of the oldest log structures still standing in Colorado as of 2012.
- Golden Cemetery listed on the National Register of Historic Places
March 26 - April 2, 2012
Lower North Fork Fire claims three lives, making it the first lethal wildfire in Jefferson County in 152 years. The fire spreads over 1400 acres burning 23 houses, a barn, and the historic 1887 Lamb School on Kuehster Road.
April 13, 2012
Burial of sesquicentennial time capsule in the Memorial Garden west of the Courts and Administration Building on the Jefferson County Government Center campus.
- Colorow Council Tree (at least 400 years old) and Rooney Ranch Picnic Site approved as County's newest landmarks. This designation marks the first natural feature to be named as a landmark.
- Denver Mountain Parks celebrates its centennial (100 years)
September 13, 2012
President Barack Obama visits Golden for a public event. He is the second sitting President known to visit Golden.
Colorado voters pass Amendment 64, legalizing marijuana for recreational use. The first retail marijuana businesses are licensed in January 2014.
November 7, 2012
Jefferson County Open Space celebrates its 40th anniversary.
Fruitdale School at 10801 W 44th Avenue in Wheat Ridge added to the National Register of Historic Places. Designed by Temple Hoyne Buell in 1927.
April 26, 2013
West corridor light rail line (W Line) opens, linking Golden and parts of Jefferson County with 11 stations that connect to downtown Denver. New line follows the historic Denver, Lakewood and Golden line.
May 18, 2013
Staunton State Park opens to the public. Staunton Ranch buildings designated as National Rural Historic Landscape on December 4, 2012.
July 7, 2013
Baehrden Lodge in Pine Valley Ranch Park reopens to the public after restoration. Designed by J.J.B. Benedict in 1928.
Major floods hit the Front Range. In Jefferson County, Clear Creek, Bear Creek, and Coal Creek Canyon hardest hit.
- Little White Schoolhouse in Conifer added to the National Register of Historic Places
- MillerCoors' Golden brewery named Colorado Recycler of the Year by the Colorado Association for Recycling
Colorado's first retail marijuana businesses are licensed. The operation of marijuana cultivation facilities, product facilities, and retail marijuana stores are prohibited in unincorporated Jefferson County.
October 5, 2014
Travis Edward Sandlin is first person to escape from the Jefferson County Detention Center. He escapes from the 6th floor of the North Tower and is on the run for 10 days, recaptured in Boulder County.
October 17, 2014
Ken-Caryl Ranch celebrates 100 years.
- Colorado School of Mines named top engineering college in the United States by USA Today newspaper
- The Bradford-Perley Site in Ken Caryl Ranch vicinity listed on the National Register of Historic Places
- Tiny Town celebrates 100 years
- Red Rocks Park and Mount Morrison Civilian Conservation Corps (CCC) Camp designated National Historic Landmarks
- Church's Crossing Stage Stop Well designated a Jefferson County Landmark
- The 1886 District 17 Medlen School listed on the National Register of Historic Places
- Casa Bonita restaurant, in the JCRS Shopping Center on West Colfax, awarded Landmark status by the Lakewood Historical Society
Jefferson County Sheriff K-9 Flash passes away from cancer after nine year tenure with Sheriff's Office.
May 21, 2015
Golden's Frederick A. "Heinie" Foss, of Foss General Store, dies.
October 1, 2015
Historic Horton House in Morrison severely damaged by fire.
September 8, 2015
Astor House in Golden closes to undergo a major, two year rehabilitation and preservation project.
- Jefferson County Archives celebrates 25 years
- Golden Transcript celebrates 150 years of continuous publication of its newspaper, never having missed an edition
- Alderfer Ranch House and Barn, Buffalo Park Road, declared a Jefferson County Landmark
- Arvada Jaycee Hall at 5640 Yukon Street, built 1901 to 1902, declared a Jefferson County Landmark
- The "Big Red Barn" at Beaver Ranch, 11299 S Foxton Road in Conifer, declared a Jefferson County Landmark
- The Center for the Arts Building in Evergreen declared a Jefferson County Landmark
- Golden's Heritage Square Victorian Village and Alpine Slide close by end of year
September 15, 2016
Joe Coors, Jr., great-grandson of Adolph Coors, dies at the age of 74.
- CSU Extension celebrates 100 years in Jefferson County
- Boettcher Mansion on Lookout Mountain celebrates its 100th Anniversary
January 5, 2017
Golden Transcript publishes its 11,200th edition.
January 10, 2017
100th Anniversary of Buffalo Bill's death.