Colorado State Highway 128

Eastern Mojave Vegetation	State Highway 128, 120th Avenue
	Tom Schweich

	East-west north of Denver, discontinuous, and carrying several different names, West 120th Avenue, Interlocken Loop, and East 120th Avenue
Other articles: • CO Hwy 93: at CO 128;	Junction: Colorado Highway 93
	Junction: 119th Avenue
Locations: Rocky Flats National Wildlife Refuge.	Rocky Flats National Wildlife Refuge Colorado Highway 128 forms a portion of the northern boundary of the refuge.
	Intersection: McCaslin Blvd.
	Intersection: Indiana Street
	Intersection: Ridge Parkway
	Intersection: El Dorado Blvd
	Intersection: Simms Street
	Intersection: Interlocken Loop, one branch turns north, and another follows Colorado Highway 128 east to the intersection with Colorado Highway 121, Wadsworth Parkway.
	Intersection: Network Parkway
	Intersection: Interlocken Blvd.
Other articles: • Wadsworth: at Interlocken;	Intersection: Colorado State Highway 121, “Wadsworth Parkway”
	Colorado Highway 128 passes over US Highway 36, “Denver-Boulder Turnpike.”
	Colorado Highway 128 passes over Commerce Street.
	Intersection: Wadsworth Blvd.
	End of Street.
	Gap
	Intersection: US Highway 287, Federal Blvd
Other articles: • US Interstate 25: at Exit 223;	Junction: US Interstate 25
	Continue east on East 120th Avenue.
If you have a question or a comment you may write to me at: tomas@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address.	[Home Page] [Site Map] Date and time this article was prepared: 1/24/2026 11:30:42 AM

Rocky Flats National Wildlife Refuge