State Highway 142
Los Caminos Antiguos
Map southern Colorado with SH 142 highlighted in red
Route information
Maintained by CDOT
Length	33.5 mi[1] (53.9 km)
Major junctions
West end	US 285 / SH 17 in Romeo
East end	SH 159 in San Luis
Location
Country	United States
State	Colorado
Counties	Conejos, Costilla
Highway system
Colorado State Highway System Interstate US State Scenic
← SH 141 → SH 144

State Highway 142 (SH 142) is a 33.5-mile (53.913 km) long state highway in southern Colorado. SH 142's western terminus is at U.S. Route 285 (US 285) near Romeo, and the eastern terminus is at SH 159 in San Luis.

Route description

SH 142 begins in the west at its junction with US 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 SH 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. SH 142 connects the two river valleys (Conejos, Culebra Creek), passing through a high desert with little vegetation.

Scenic Byway

All of the highway is part of the Los Caminos Antiguos Scenic Byway^[2]

• 
  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.

Major intersections

County	Location	mi[1]	km	Destinations	Notes
Conejos	Romeo	0.00	0.00	US 285 (SH 17) – Antonito, La Jara	Western terminus
Rio Grande		14.3	23.0	Bridge
Costilla	San Luis	33.5	53.9	SH 159	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi