Colorado State Highway 142

State Highway 142
Map of southern Colorado with SH 142 highlighted in red
Route information
Maintained by CDOT
Length:	33.8 mi (54.4 km)
Major junctions
West end:	US 285 outside Romeo
East end:	SH 159 at San Luis
Location
Counties:	Conjeos, Costilla
Highway system
Colorado State Highways Interstate U.S. State Scenic ← SH 141 SH 144 →

State Highway 142 (SH 142) is a 33.8 mi (54.4 km) long state highway in southern Colorado.

SH 142 begins in the west at its junction with U.S. Highway 285 mere feet outside the city limits of Romeo. The route heads east through the towns of Manassa and San Acacio before reaching its eastern terminus at San Luis where it meets State Highway 159.

The highway passes through the San Luis Hills and over the Rio Grande. The Manassa Dike is visible from the highway as it passes through the hills. Overall, the highway has very little traffic, especially the section that passes through the San Luis Hills. Highway 142 connects the two river valleys (Conejos, Culebra Creek), passing through a high desert with little vegetation.

All of the highway is part of the Los Caminos Antiguos Scenic Byway

Looking west from the San Luis Hills.

Romeo, Colorado, the western terminus of the highway.

The eastern end of the highway in San Luis, Colorado.