Map of Northern Belt Line in Jefferson County

Jefferson County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 582,910, making it the fourth-most populous county in Colorado. The county seat is Golden, and the most populous city is Lakewood.

Country: United States
State: Colorado
Founded: November 1, 1861
Named for: Jefferson Territory
Seat: Golden
Largest city: Lakewood
Congressional districts: 1st, 2nd, 6th, 7th

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Dinosaur Ridge

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Dedisse Park

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Morrison Natural History Museum

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North Table Mountain

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Hiking · Forests · Mountains

Mines Museum of Earth Science

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Red Rocks Park

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White Ranch Park

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Green Mountain

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Two Ponds Wine & Spirits

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Data from: en.wikipedia.org