Summit County is a

county A county () is a geographic region of a country used for administrative or other purposesL. Brookes (ed.) '' Chambers Dictionary''. Edinburgh: Chambers Harrap Publishers Ltd, 2005. in some nations. The term is derived from the Old French denoti ...

located in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its so ...

Colorado Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...

. As of the 2020 census, the population was 31,055. The

county seat A county seat is an administrative center, seat of government, or capital city of a county or parish (administrative division), civil parish. The term is in use in five countries: Canada, China, Hungary, Romania, and the United States. An equiva ...

and largest town is Breckenridge. Summit County comprises the Breckenridge, CO Micropolitan Statistical Area.

History

Summit County was organized as one of the seventeen original Colorado counties by the First Territorial Legislature on November 1, 1861. It was named for the many mountain summits in the county. Until February 2, 1874, its boundaries included the area now comprising Summit County, Grand County, Routt County, Moffat County, Garfield County, Eagle County, and Rio Blanco County. In 1874, the northern half of the original Summit County was split off to form Grand County; with the creation of

Garfield ''Garfield'' is an American comic strip created by Jim Davis (cartoonist), Jim Davis. Originally published locally as ''Jon'' in 1976 (later changed to ''Garfield'' in 1977), then in nationwide Print syndication, syndication from 1978, it chro ...

and

Eagle Eagle is the common name for the golden eagle, bald eagle, and other birds of prey in the family of the Accipitridae. Eagles belong to several groups of Genus, genera, some of which are closely related. True eagles comprise the genus ''Aquila ( ...

counties in 1883, Summit County arrived at its present boundaries. In addition, Summit County has seen two major boom eras.

Geography

According to the

U.S. Census Bureau The United States Census Bureau, officially the Bureau of the Census, is a principal agency of the U.S. federal statistical system, responsible for producing data about the American people and economy. The U.S. Census Bureau is part of the U ...

, the county has a total area of , of which is land and (1.8%) is water. The terrain of the county is mountainous with elevations ranging from at Green Mountain Reservoir to at Grays Peak. The elevation of the county seat of Breckenridge is , making it one of the highest cities in the state of Colorado and the United States. Much of the county has an

alpine climate Alpine climate is the typical climate for elevations above the tree line, where trees fail to grow due to cold. This climate is also referred to as a mountain climate or highland climate. Definition There are multiple definitions of alpine cli ...

(ET in the

Köppen Classification Köppen is a German surname. Notable people with the surname include: * Bernd Köppen (1951–2014), German pianist and composer * Carl Köppen (1833-1907), German military advisor in Meiji era Japan * Edlef Köppen (1893–1939), German author ...

) characterized by

tundra In physical geography, a tundra () is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. There are three regions and associated types of tundra: #Arctic, Arctic, Alpine tundra, Alpine, and #Antarctic ...

vegetation. Breckenridge and other similar elevations in the county have a

subarctic climate The subarctic climate (also called subpolar climate, or boreal climate) is a continental climate with long, cold (often very cold) winters, and short, warm to cool summers. It is found on large landmasses, often away from the moderating effects of ...

(Dfc) characterized by cool summers and abundant snowfall in winter.

Adjacent counties

* Grand County – north * Clear Creek County – east * Park County – southeast * Lake County – southwest * Eagle County – west

Major highways

Interstate 70 Interstate 70 (I-70) is a major east–west Interstate Highway in the United States that runs from Interstate 15, I-15 near Cove Fort, Utah, to Interstate 695 (Maryland), I-695 and Maryland Route 570 (MD 570) in Woodlawn, Baltimo ...

* *

U.S. Highway 6 * Colorado 9

State Highway 9 * Colorado 91

State Highway 91

Demographics

As of the

census A census (from Latin ''censere'', 'to assess') is the procedure of systematically acquiring, recording, and calculating population information about the members of a given Statistical population, population, usually displayed in the form of stati ...

of 2000, there were 23,548 people, 9,120 households, and 4,769 families residing in the county. The

population density Population density (in agriculture: Standing stock (disambiguation), standing stock or plant density) is a measurement of population per unit land area. It is mostly applied to humans, but sometimes to other living organisms too. It is a key geog ...

was . There were 24,201 housing units at an average density of . The racial makeup of the county was 91.84%

White White is the lightest color and is achromatic (having no chroma). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully (or almost fully) reflect and scatter all the visible wa ...

, 0.68%

Black Black is a color that results from the absence or complete absorption of visible light. It is an achromatic color, without chroma, like white and grey. It is often used symbolically or figuratively to represent darkness.Eva Heller, ''P ...

African American African Americans, also known as Black Americans and formerly also called Afro-Americans, are an Race and ethnicity in the United States, American racial and ethnic group that consists of Americans who have total or partial ancestry from an ...

, 0.48% Native American, 0.87% Asian, 0.07%

Pacific Islander Pacific Islanders, Pasifika, Pasefika, Pacificans, or rarely Pacificers are the peoples of the list of islands in the Pacific Ocean, Pacific Islands. As an ethnic group, ethnic/race (human categorization), racial term, it is used to describe th ...

, 3.96% from other races, and 2.10% from two or more races. 9.79% of the population were

Hispanic The term Hispanic () are people, Spanish culture, cultures, or countries related to Spain, the Spanish language, or broadly. In some contexts, Hispanic and Latino Americans, especially within the United States, "Hispanic" is used as an Ethnici ...

or Latino of any race. There were 9,120 households, out of which 24.00% had children under the age of 18 living with them, 44.00% were

married couples Marriage, also called matrimony or wedlock, is a culturally and often legally recognised union between people called spouses. It establishes rights and obligations between them, as well as between them and their children (if any), and b ...

living together, 4.40% had a female householder with no husband present, and 47.70% were non-families. 21.60% of all households were made up of individuals, and 1.60% had someone living alone who was 65 years of age or older. The average household size was 2.48 and the average family size was 2.86. In the county, the population was spread out, with 17.40% under the age of 18, 15.70% from 18 to 24, 44.30% from 25 to 44, 19.40% from 45 to 64, and 3.30% who were 65 years of age or older. The median age was 31 years. As of 2014, the life expectancy in Summit County was 86.83 years, the longest average life expectancy of any county in the United States. For every 100 females there were 139.00 males. For every 100 females age 18 and over, there were 144.90 males. The median income for a household in the county was $56,587, and the median income for a family was $66,914 (these figures had risen to $65,281 and $80,441 respectively as of a 2007 estimate). Males had a median income of $33,741 versus $27,017 for females. The

per capita income Per capita income (PCI) or average income measures the average income earned per person in a given area (city, region, country, etc.) in a specified year. In many countries, per capita income is determined using regular population surveys, such ...

for the county was $28,676. About 3.10% of families and 9.00% of the population were below the

poverty line The poverty threshold, poverty limit, poverty line, or breadline is the minimum level of income deemed adequate in a particular country. The poverty line is usually calculated by estimating the total cost of one year's worth of necessities for ...

, including 4.30% of those under age 18 and 3.40% of those age 65 or over. The 2019 average real estate prices in Summit County were $1,262,929 for a single family home, $559,776 for a condo, townhome or duplex and $344,945 for a vacant piece of land (YTD through December 2019).

Life expectancy

According to a report in the

Journal of the American Medical Association ''JAMA'' (''The Journal of the American Medical Association'') is a peer-reviewed medical journal published 48 times a year by the American Medical Association. It publishes original research, reviews, and editorials covering all aspects of ...

, residents of Summit County had a 2014 life expectancy from birth of 86.83 years in 2014, the longest in the United States. Both men and women live longer in Summit County than in any other county in the United States: 85.5 years for men and 88.0 years for women is the life expectancy at birth. Two contiguous counties, Pitkin and

counties, rank numbers two and three in the nation in life expectancy. Factors contributing to the high life expectancy in Summit County are "high education, high income, high access to medical care, the people are physically active, obesity is lower than anywhere else — so you’re doing it right,” said Dr. Ali Mokdad, one of the study's co-authors.Achenbach, Joel, "U.S. life expectancy varies more than 20 years from county to county," ''Washington Post'', May 8, 2017

Education

K–12 schools

Elementary schools

*Breckenridge Elementary School *Dillon Valley Elementary School (Dillon) *Frisco Elementary School *Silverthorne Elementary School *Summit Cove Elementary School (Dillon) *Upper Blue Elementary School (Breckenridge)

Middle school

*Summit Middle School (Frisco)

High schools

*Snowy Peaks Junior/Senior High School (Frisco) *Summit High School (Breckenridge)

Higher education

Colorado Mountain College Colorado Mountain College (CMC) is a Public college, public community college with multiple campuses in western Colorado, and headquartered in Glenwood Springs, Colorado. Founded in 1965, the institution offers numerous associate degrees, eigh ...

operates campuses in Breckenridge and Dillon.

Politics

Summit County is liberal in most elections. Since 1988 the county has trended strongly toward the Democratic Party, like many other counties in Colorado dominated by ski towns. In 2020, Joe Biden's performance was the best by a Democrat since 1916, and Kamala Harris' performance was only slightly worse in 2024.

Communities

Towns

* Blue River * Breckenridge * Dillon * Frisco * Keystone * Montezuma * Silverthorne

Census-designated places

* Copper Mountain * Heeney

Ghost towns

* Dyersville * Kokomo * Parkville * Preston * Saints John *

Tiger The tiger (''Panthera tigris'') is a large Felidae, cat and a member of the genus ''Panthera'' native to Asia. It has a powerful, muscular body with a large head and paws, a long tail and orange fur with black, mostly vertical stripes. It is ...

Recreation

National protected areas

* White River National Forest * Eagles Nest Wilderness

Ski areas

* Arapahoe Basin * Breckenridge * Copper Mountain * Keystone

Trails and byways

American Discovery Trail The American Discovery Trail is a system of recreational trails and roads that collectively form a coast-to-coast hiking and biking trail across the mid-tier of the United States. Horses can also be ridden on most of this trail. The coastal tr ...

Colorado Trail The Colorado Trail is a long-distance trail running for from the mouth of Waterton Canyon southwest of Denver to Durango in Colorado, United States. Its highest point is above sea level, and most of the trail is above . Despite its high elev ...

* Continental Divide National Scenic Trail * Great Parks Bicycle Route *

Top of the Rockies National Scenic Byway The Top of the Rockies National Scenic Byway is a National Scenic Byway and Colorado Scenic and Historic Byway located in the high Rocky Mountains of Eagle County, Colorado, Eagle, Lake County, Colorado, Lake, Pitkin County, Colorado, Pitkin, Su ...

* TransAmerica Trail Bicycle Route * Vail Pass National Recreation Trail * Wheeler Ten Mile National Recreation Trail

Lakes

The county has three reservoirs,

Lake Dillon Dillon Reservoir, sometimes referred to as Lake Dillon, is a large fresh water reservoir located in Summit County, Colorado, United States, south of I-70 and bordered by the towns of Frisco, Silverthorne, and Dillon. It is a reservoir for t ...

, Green Mountain Reservoir, and Clinton Gulch Dam Reservoir that are also popular recreation sites.

Islands

* Silver Dollar Island

Concert venues

* Dillon Amphitheater

References

External links

*
Colorado County Evolution by Don StanwyckColorado Historical Society
{{authority control Colorado counties 1861 establishments in Colorado Territory Populated places established in 1861