Milestones Icon: Diagonal Highway

It’s the road to somewhere – the Diagonal Highway between Longmont and Boulder is an economic driver for both cities.

Finished in 1960, the Diagonal Highway is officially known as Colorado Highway 119. It’s a double-divided road with numerous stoplights that parallels the tracks of the Burlington Northern Santa Fe Railway.

The 18-mile long Diagonal starts at the north end of Foothills Parkway in Boulder and ends at the west end of Ken Pratt Boulevard at Hover Street in Longmont.

In between, the Diagonal Highway generates more than just traffic. It runs by Gunbarrel business center, most commonly accessed by 63rd Street. Well-known…