Colorado 121 follows South Platte Canyon Road and Wadsworth Boulevard (also called Wadsworth Parkway in some areas) along a 30.83 mile course mostly through Jefferson County. The state highway begins at the entrance to the Lockheed Martin plant, at the south end of Chatfield State Park and near the Platte Canyon Reservoir naer Kassler Road. Serving suburban locations, Wadsworth Boulevard varies between four and six lanes north to Bear Valley in Denver, and through the cities of Lakewood, Wheat Ridge, Arvade and Westminster. The north end is located at U.S. 287 in Broomfield near the interchange with U.S. 36 (Denver-Boulder Turnpike) and Colorado 128.


Colorado 121 north
Colorado 121 (Wadsworth Boulevard) north at U.S. 40 (Colfax Avenue) in Lakewood. Colfax Avenue is also Business Loop I-70, but that designation is generally not displayed on intersecting roads. Photo taken 02/02/02.
Heading north by the Wheat Ridge neighborhoods of Hillcrest Heights and Clear Creek Vista, Colorado 121 nears the eastbound on-ramp for both Interstates 70 and 76. Photo taken 02/02/02.
Wadsworth Boulevard spans Clear Creek as it splits with the eastbound ramps for Denver and Fort Morgan. A loop ramp follows for I-70 west to Golden and Grand Junction. Photo taken 02/02/02.
Colorado 121 south
Colorado 121 begins at a trumpet interchange with U.S. 287 in Broomfield. From there, it immediately meets the ramps with U.S. 36 (Denver-Boulder Turnpike) and a signalized intersection with Colorado 128 (Interlocken Loop, formerly 120th Avenue). Colorado 128 travels west to serve Rocky Mountain Metropolitan Airport (BJC), passing by the Rocky Flats (a former Department of Energy facility that is now a national wildlife refuge), and then ending at Colorado 93 (Foothills Road). Photo taken 08/28/04.
Much of Colorado 121 near Broomfield and Westmister in Jefferson County was reconstructed by the early 2000s. Wadsworth Parkway is heavily traveled by commuters making the connection from U.S. 36 and U.S. 287 south to western areas of Denver, as well as Arvada, Wheat Ridge and Lakewood. This scene looks just south of Colorado 121 at what was a previously undeveloped stretch of Wadsworth Parkway. Photo taken 08/28/04.
Colorado 121 shifts east of Olde Town Arvada on the Wadsworth Bypass to a retail corridor preceding Interstates 70 and 76. Photo taken 08/28/04.
All traffic interests to Interstate 70 and I-76 east departs in unison from SH 121 south. A flyover carries motorists east to a ramp split for I-70 across north Denver and Aurora and I-76 northeast to Commerce City and Fort Morgan. A grade level ramp joins I-70 west to Wheat Ridge, Golden, Idaho Springs and most mountain destinations and ski resorts. Photo taken 08/28/04.
Continuing south, Colorado 121 leaves Wheat Ridge and enters Lakewood one mile north of the intersection with Colfax Avenue (Business Loop I-70 and U.S. 40). The business route follows Colfax Avenue west to Golden and east to Downtown Denver and the state capitol. Photo taken 08/28/04.
Approaching U.S. 6 (6th Avenue) on Colorado 121 (Wadsworth Boulevard) by the Green Acres neighborhood in the city of Lakewood. Sixth Avenue was a city street that was upgraded to an expressway in the late 1950s, and subsequently brought to freeway standards in stages thereafter. Photo taken 08/10/14.
The 6th Avenue freeway of U.S. 6 provides a fast alternate route between Golden and Denver, avoiding Colfax Avenue and Interstate 70. Frontage roads line both sides of the freeway. Photo taken 08/10/14.
Entering the full cloverleaf interchange with U.S. 6 on Wadsworth Boulevard south. The US 6 & Wadsworth Boulevard project will remove three of the four loops, realign the north frontage roads, and added signalized intersections with the realigned ramps. Photo taken 08/10/14.
SH 121 south at the U.S. 6 loop ramp for Villa Park, Barnum and Valverde in Denver. A signalized left turn will replace this ramp. Photo taken 08/10/14.
Wadsworth Boulevard continues south from U.S. 6 as a commercial arterial to 1st Avenue and Fairfield Commons Shopping Center. 1st Avenue heads east to O' Kane Park and west to Mid-Lakewood. Photo taken 08/10/14.
Reassurance marker for SH 121 south after 1st Avenue and ahead of the signal with Ellsworth Avenue and the adjacent retail center. Photo taken 08/10/14.
West Virginia Avenue intersects SH 121 at the Lakewood City Commons retail area, just east of the Lakewood city hall. Photo taken 08/10/14.
South from Lakewood City Commons, Wadsworth Boulevard dips through Weir Gulch at Belmar Park. Photo taken 08/10/14.
Colorado 121 (Wadsworth Boulevard) south intersects the east end of Colorado 8 (Morrison Road) near Ward Reservoir #1 and the Westgate neighborhood. Photo taken 08/10/14.
Colorado 8 (Morrison Road) travels 8.68 miles west to the town of Morrison and south to U.S. 285 near Indian Hills. The state highway follows most of old U.S. 285. Photo taken 08/10/14.
Wadsworth Boulevard lowers from the bluff at Westgate to Bear Creek Greenbelt park. Photo taken 08/10/14.
Colorado 121 (Wadsworth Boulevard) south separates the Denver city / county line from Lakewood. Yale Avenue heads west from Bear Valley in Denver along the north side of Bear Creek Greenbelt. Photo taken 08/10/14.
Eastman Place intersects Wadsworth Boulevard amid a cluster of retail, apartments and assisted living facilities. Photo taken 08/10/14.
The commercialized stretch of Colorado 121 through south Lakewood culminates at Hampden Avenue and the U.S. 285 freeway. Photo taken 08/10/14.
U.S. 285 passes over Colorado 121 at a diamond interchange. Photo taken 08/10/14.
Southbound U.S. 285 straddles the Lakewood city line west to Bear Creek Lake Park and C-470. Photo taken 08/10/14.
U.S. 285 travels east to Interstate 25 at University Hills in Denver and southwest to Aspen Park and Fair Play. Photo taken 08/10/14.
The U.S. 285 freeway along Hampden Avenue continues east into the city of Sheridan. Photo taken 08/10/14.
Colorado 121 scenes
Approaching SH 121 (Wadsworth Boulevard) along Bowles Avenue westbound by Bowles Crossing Shopping Center. Photo taken 08/10/04.



Photo Credits:

02/02/02, 08/10/04, 08/28/04, 08/10/14 by AARoads

Connect with:
Interstate 70
Interstate 76
U.S. 6
U.S. 36
U.S. 285

Page Updated 04-20-2017.