Thornton

Thornton is its own home rule city north of Denver, almost entirely in Adams County with a piece reaching into Weld. It stretches from the original blocks around 88th Avenue and Washington Street up to State Highway 7 (East 160th Avenue) along much of the north edge. I-25 runs through it twice, with Northglenn in between, and Westminster, Federal Heights, Broomfield and Commerce City are the other neighbors.

How Thornton started

Sam Hoffman's F&S Construction began building here in 1953 on land he bought from local landowners, and he named the new town for the sitting governor, Dan Thornton. Russell Boulevard, the curviest street in town, is named for the actress Jane Russell. More than 1,200 homes stood by the end of 1955, and Thornton became a city in 1956.

Original Thornton's brick ranches

Every house in the original tract is one story, and the early ones sit on concrete slabs with no basement, so ask where the storage and extra living space are. The brick usually comes in contrasting shades, often laid in a decorative pattern, with a big picture window facing the street and a low hipped or gabled roof. Hoffman built from a short list of models and varied the rooflines and setbacks so a block doesn't look stamped out. The streets curve into cul-de-sacs. Iron-post porches, metal awnings and carports went on early and many are still there.

Few of the original houses came with a garage, and a good share still don't have one. Fences don't always sit on the real lot line either. If a garage or an addition is part of your plan, get a site survey and talk to the city's planning and building staff before you count on it.

Carpenter Park, Big Dry Creek and a nature library

The city counts 81 parks and more than 80 miles of trail. Margaret W. Carpenter Park and Open Space, off Colorado Boulevard at 112th Avenue, is the big one, with ponds, a pier and boardwalk, a carousel, a skate park, a recreation center and a 2-mile walking loop. Its playground and splash pad are due for a redesign, with construction planned for 2027 and 2028. A paved stretch of the Big Dry Creek Trail starts near I-25 and Thorncreek Golf Course and follows the creek almost to 168th Avenue.

Farther north, the Anythink Nature Library opened on August 8, 2026, on the 140-acre Aylor Open Space. It lends about 550 pieces of outdoor gear, from hammocks to GPS units, and has a one-mile hiking loop. The city plans to add a larger trail network around it.

Burgers on 88th, seafood on Grant

Jim's Burger Haven goes back to 1961, and the original is at 595 East 88th Avenue, a retro-style diner known for smash burgers on a 6-inch bun. Saigon Bowl opened at 9931 Grant Street in 2019 and leans on the seafood of its owner's hometown, the Vietnamese coastal city of Nha Trang. Larkridge, Thornton Town Center and Thorncreek Crossing handle the bigger shopping trips.

Getting to Denver

I-25 is the main way south, and E-470 crosses the north end of the city. RTD's N Line commuter rail opened on September 21, 2020, with three Thornton stations: Original Thornton/88th, Thornton Crossroads/104th and Eastlake/124th, the end of the line for now. Original Thornton/88th is the stop for the 1950s blocks. From Eastlake it's 13 miles of track to Union Station.