Colorado State Highway 93

Colorado State Highway 93
Fredddie, originally by User:Atanamir, User:TwinsMetsFan, or User:Pzoxicuvybtnrm · Public domain · source
State	CO
Type	SH
Route	93
Length mi	28.9
Established	1920s
Direction a	South
Terminus a	Golden, Colorado
Direction b	North
Terminus b	Boulder, Colorado
Counties	Jefferson County, Colorado; Boulder County, Colorado

Colorado State Highway 93

Colorado State Highway 93 is a north–south state highway that connects Golden, Colorado and Boulder, Colorado, traversing the foothills of the Rocky Mountains between I‑70 and US 36. Serving as a commuter and regional connector, the route links suburban communities, industrial corridors, and recreational access points near Clear Creek and the South Boulder Creek. The highway provides an alternate to mountain passes and interstates for local traffic and freight movement between the Denver metropolitan area and the Boulder Valley.

Route description

SH 93 begins at an interchange with I‑70 near Golden, Colorado, just south of Coors and east of the Clear Creek Canyon corridor. Proceeding north, the highway follows a relatively straight alignment through Golden Gates, paralleling rail lines formerly belonging to Denver, South Park and Pacific Railroad and adjacent to industrial parcels that historically served mining and steel industry operations. The corridor intersects local arterials that connect to SH 58 and provides access to Colorado School of Mines, Lookout Mountain, and Evergreen-oriented recreational trails.

Continuing into Jefferson County, Colorado agricultural and suburban fringe, the roadway traverses through neighborhoods that feed commuters into Denver Union Station and the Boulder Transit Village. Approaching Boulder, Colorado, SH 93 descends into the South Boulder Creek basin and terminates at an interchange with US 36, a major corridor linking Boulder County, Colorado to Denver, Colorado. Nearby landmarks include the Flatirons, the University of Colorado Boulder, and municipal facilities in Boulder County. The alignment crosses minor streams and connects to county roads that serve Boulder Reservoir and regional open space preserves managed by Boulder County Parks and Open Space.

History

The origin of the highway traces to early 20th‑century auto trails and wagon paths that linked Golden, Colorado and Boulder, Colorado as settlers and miners moved between mining camps and agricultural homesteads. During the 1920s and 1930s, portions of the route were incorporated into Colorado's numbered highway system as demand increased due to expansion of Coors Brewing Company and the growth of University of Colorado Boulder enrollment. Post‑World War II suburbanization in Jefferson County, Colorado and Boulder County, Colorado prompted widening projects and pavement upgrades funded by state bond initiatives and federal highway programs such as those administered by the Federal Highway Administration.

The late 20th century saw safety and capacity improvements amid increased commuter flows to Denver International Airport and metropolitan employment centers, with interchanges modernized to accommodate traffic to I‑70 and US 36. Environmental review processes involving agencies like the Colorado Department of Transportation and local governments addressed impacts on riparian habitats in the Clear Creek and South Boulder Creek watersheds as well as recreational access to Rocky Flats National Wildlife Refuge and regional open space.

Major intersections

- Southern terminus: Interchange with I‑70 near Golden, Colorado. - Local connector: Intersection with SH 58 access toward Arvada, Colorado and Denver West. - County arterial links: Connections to county roads serving Mount Vernon Canyon and the Clear Creek Canyon Road corridors. - Northern terminus: Interchange with US 36 near Boulder, Colorado providing access to Longmont, Colorado and Denver, Colorado.

Traffic and usage

SH 93 functions both as a commuter arterial and a regional freight route, handling volumes that fluctuate with peak inbound and outbound periods tied to employment centers such as Downtown Denver, Boulder County jobs, and industrial parks near Golden, Colorado. Traffic counts recorded by the Colorado Department of Transportation show higher average annual daily traffic (AADT) near the termini, especially at ramps connecting to I‑70 and US 36; volumes decrease through less developed midsections that abut open space and light industrial land uses.

The corridor accommodates transit and paratransit services linking to regional systems including Regional Transportation District (RTD) and Boulder County Transit, and it is an important route for emergency response coordination involving Jefferson County Sheriff's Office and Boulder County Fire-Rescue. Seasonal recreational traffic increases occur during weekends and holidays as travelers access trailheads associated with the Flatirons and other Boulder County Parks and Open Space amenities.

Future developments and improvements

Planned improvements emphasize safety, multimodal access, and environmental stewardship. Proposed projects by the Colorado Department of Transportation and local jurisdictions include intersection reconfigurations, signal timing upgrades, and added bicycle and pedestrian facilities to improve connectivity to University of Colorado Boulder and transit hubs like Boulder Transit Village. Freight management strategies coordinate with regional planning bodies such as the Denver Regional Council of Governments to mitigate congestion during peak periods.

Environmental mitigation measures under consideration address stormwater runoff into Clear Creek tributaries and habitat connectivity for species protected under state and federal statutes, with collaboration from organizations like Boulder County Parks and Open Space and the U.S. Fish and Wildlife Service. Funding sources under review include state transportation funds, federal grants administered by the Federal Highway Administration, and local ballot measures that have been used historically to finance corridor enhancements.

Category:State highways in Colorado