Colorado State Highway 121

State Highway 121 (SH 121) is a 30.425 mile (48.96 km) long state highway in the U.S. state of Colorado. SH 121's southern terminus is at Waterton Road near Littleton, and the northern terminus is at U.S. Route 287 (US 287) in Broomfield.

State Highway 121 marker

State Highway 121

Wadsworth Boulevard
Map of north central Colorado with SH 121 highlighted in red
Route information
Maintained by CDOT
Length30.425 mi[1] (48.964 km)
Major junctions
South endWaterton Road near Littleton
Major intersections
North end US 287 in Broomfield
Location
CountryUnited States
StateColorado
CountiesJefferson, Denver, Broomfield
Highway system
  • Colorado State Highway System
← SH 120→ SH 125

Route description
End of SH 121 just before Waterton Road

The route, also known as Wadsworth Boulevard, Wadsworth Bypass, and Wadsworth Parkway, starts at a junction with Waterton Road in unincorporated Jefferson County (near Littleton and at the entrance to the main plant of Lockheed Martin Space Systems) and ends at the junction of U.S. Route 36, U.S. Route 287, and State Highway 128 in Broomfield at a trumpet interchange. State Highway 121 passes through portions of southwest Denver County.

History
Wadsworth Boulevard (Colorado Highway 121) at Bowles Ave. in Littleton, Colorado.

The name Wadsworth comes from Benjamin Franklin Wadsworth, one of the founders and first postmaster of Arvada. In northwest Arvada, Wadsworth Boulevard passes over Hackberry Hill at the site where a landmark hackberry tree, for which the hill was named, stood before it was cut down to make room for the highway in 1937. [2]

Major intersections
CountyLocationmikmDestinationsNotes
Jefferson​0.000.00Waterton RoadSouthern terminus
​4.417.10 SH 470C-470 Exit 13; Interchange;
Lakewood7.4912.05 US 285 (Hampden Avenue)Interchange
9.0614.58
 SH 8 west (Morrison Road)		Eastern terminus of SH-8
12.4420.02 US 6 (Sixth Avenue)Interchange
13.5921.87 US 40 / I-70 BL (Colfax Avenue)
Arvada16.7927.02
 I-70 / I-76 east – Denver, Fort Morgan, Grand Junction		I-76 exit 1a; I-70 exit 269a
City and County of Broomfield25.8241.55 SH 128 (Interlocken Loop)
26.0241.88 US 36 – Denver, BoulderInterchange
26.4242.52 US 287Interchange; Northern terminus, Road continues north as US-287.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References
  1. "Segment list for SH 121". Retrieved 2007-05-12.
  2. "Jefferson County, Colorado Place Names Directory". Retrieved 2012-03-23.
Template:Attached KML/Colorado State Highway 121
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