Longmont, CO

Longmont began as a planned town with a one-square-mile grid. In 1870, the Chicago-Colorado Colony sold memberships to buy a townsite and surrounding farms; colonists placed stores on Main Street, homes on a street grid, and three parks, then built the settlement in 1871 and named it for Longs Peak. Irrigation canals made farming possible in the dry St. Vrain Valley. A flour mill opened in 1872, followed by vegetable processing and an east-side sugar factory in 1903. Those industries attracted workers from northern Europe, Russia, Mexico, New Mexico, Texas, and Japan. The city now extends across Boulder and Weld counties, though the original Main Street grid remains the center of downtown. The economy changed sharply after the middle of the twentieth century.

ATTRJayostrom / CC BY-SA 4.0

A federal air-traffic-control center opened in 1962, and IBM announced a large facility between Longmont and Boulder in 1965, accelerating a shift from agriculture toward technology. Bioscience, aerospace, technology, and advanced manufacturing are now established parts of the local economy. Municipal infrastructure is part of that story. Voters authorized the city to provide broadband in 2011, NextLight construction began in 2014, and Longmont became the first Colorado city to offer symmetrical gigabit service citywide in 2017. The community-owned network serves homes, storefronts, offices, and manufacturers, extending a local utility tradition that previously secured irrigation water and electric power. Water also presents an ongoing public-works challenge. The September 2013 flood sent St. Vrain and Left Hand creeks into neighborhoods, business districts, and roads.

ATTRJayostrom / CC BY-SA 4.0

Longmont began the Resilient St. Vrain project downstream at Sandstone Ranch in 2016, rebuilding greenway sections and widening or reshaping the channel to reduce future flood risk. Several reaches and bridges are complete, while work continues upstream. On July 21, 2026, Izaak Walton Reach 2 between Boston Avenue and Sunset Street remained under construction, with the greenway trail there scheduled to reopen in August and landscaping planned for fall. Other reaches still awaited funding, so the creek corridor included completed paths, active construction, and future work at the same time. Downtown combines the old Main Street grid with a state-certified Creative District, shops, restaurants, breweries, galleries, and performance spaces. Its 2026 calendar included concerts, art and maker markets, classes, and smaller recurring gatherings.

ATTRBilly Hathorn / CC BY-SA 3.0

The Saturday farmers market at the Boulder County Fairgrounds reconnects city routines with the surrounding agricultural region. Four Ride Free Longmont routes operate without a fare, and regional buses run toward Boulder, Denver, Loveland, and Fort Collins. In summer 2026, the city was preparing a bus station and garage at 1st and Main for construction through 2027; the site also reserved for future rail, which had not reached Longmont. The city formed the first sister-city relationship between a U.S. municipality and a sovereign tribal nation with the Northern Arapaho Tribe in 2021. A 2025 elder exchange carried that agreement into shared meals, craft activities, and reciprocal visits between Longmont and the Wind River Reservation.