Boulder County

Diagonal Bikeway

Between Boulder and Longmont along Colorado Highway 119 in Boulder County
April 16, 2026 Submit an Update
An underpass has been built where the Diagonal Bikeway leaves the median and connects to an existing path in Longmont.
Completion of the $165 million Diagonal Bikeway, a nine-mile paved off-street path between Boulder and Longmont along Colorado Highway 119, is expected by January 2027. on Facebook on LinkedIn
PROJECT DETAILS
Location

Between Boulder and Longmont along Colorado Highway 119

Website

https://bouldercounty.gov/transportation/plans-and-projects/highway-119-bikeway-project/

Status

Current

Location

Between Boulder and Longmont along Colorado Highway 119

City

Boulder County

State

CO

Website

https://bouldercounty.gov/transportation/plans-and-projects/highway-119-bikeway-project/

Project Cost

$165 million

Owner

Colorado Department of Transportation

Developer

CDOT, Boulder County, the Regional Transportation District, Commuting Solutions and the cities of Boulder and Longmont.

General Contractor

Kraemer North America

Size

9 miles

Construction Start

September 2024

Completion Date

January 2027

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