Colorado State Highway 121
| Wadsworth Blvd | ||||
Map of north central Colorado with SH 121 highlighted in red | ||||
| Route information | ||||
| Maintained by CDOT | ||||
| Length | 30.425 mi (48.964 km) | |||
| Major junctions | ||||
| South end | Lockheed Martin Space Systems near Roxborough Park | |||
| North end | US 287 in Broomfield | |||
| Location | ||||
| Country | United States | |||
| State | Colorado | |||
| Counties | Jefferson, Denver, Broomfield | |||
| Highway system | ||||
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State Highway 121 (SH 121) also known as Wadsworth Boulevard across its entire length, 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.