State Highway 151 is a 33.9 mi (54.6 km) long state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 in far southern Colorado

Colorado

Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

.

Route description

SH 151 begins in the west at its junction with State Highway 172

Colorado State Highway 172

State Highway 172 is a long state highway in southwestern Colorado.-Route description:SH 172 begins in the south at the New Mexico state line where the road becomes New Mexico State Road 511. From there, the route travels through the Southern Ute Indian Reservation northward through Ignacio where...

 in Ignacio

Ignacio, Colorado

The Town of Ignacio is a Statutory Town located in La Plata County, Colorado, United States. The population was 669 at the 2000 census.Located within the boundaries of the Southern Ute Indian Reservation, the town is the capital of the Southern Ute Indian tribe. It was named for their...

 on the Southern Ute Indian Reservation

Southern Ute Indian Reservation

The Southern Ute Indian Reservation lies in southwestern Colorado, USA, along the northern border of New Mexico. Its territory consists of land from three counties; in descending order of surface area they are La Plata, Archuleta, and Montezuma Counties. The reservation has a land area of 1,058.785...

. From there, the road proceeds generally eastward with a southern arc past Allison

Allison, Colorado

Allison is an unincorporated community in La Plata County, Colorado, United States....

 and through Arboles

Arboles, Colorado

Arboles is a census-designated place in Archuleta County, Colorado, United States. The population was 280 at the 2010 census. The Arboles Post Office has the ZIP Code 81121...

. The route then turns to the northeast passing near Navajo State Park

Navajo State Park

Navajo State Park is a state park of Colorado, USA, on the north shore of Navajo Lake. Touted as Colorado's answer to Lake Powell, this reservoir on the San Juan River begins in Colorado's San Juan Mountains and extends into New Mexico. It covers 15,000 surface-acres and boasts of shoreline in...

 and across the Piedra River. 25.7 mi (41.4 km) from its western end at Ignacio, SH 151 enters San Juan National Forest

San Juan National Forest

The San Juan National Forest is a U.S. National Forest covering over 1,878,846 acres in Archuleta, Conjeos, Dolores, Hinsdale, La Plata, Mineral, Montezuma, Rio Grande, San Miguel and San Juan Counties in western Colorado. It borders the Uncompahgre National Forest to the north and the Rio Grande...

 through which it continues to its eastern endpoint at U.S. Highway 160 roughly six miles east of Chimney Rock

Chimney Rock, Colorado

Chimney Rock is an unincorporated community and USPS in Archuleta County, Colorado, United States. The Chimney Rock Post Office has the ZIP Code 81127.-Geography:...

.

Major intersections

County	Location	Mile	Destination	Notes
La Plata La Plata County, Colorado La Plata County is the fourteenth most populous of the 64 counties of the State of Colorado of the United States. The county was named for the La Plata River and the La Plata Mountains. "La plata" is the Spanish language word for "silver". The United States Census Bureau estimated that the...	Ignacio Ignacio, Colorado The Town of Ignacio is a Statutory Town located in La Plata County, Colorado, United States. The population was 669 at the 2000 census.Located within the boundaries of the Southern Ute Indian Reservation, the town is the capital of the Southern Ute Indian tribe. It was named for their...	0.000		West end of route
Archuleta Archuleta County, Colorado Archuleta County is one of the 64 counties of the state of Colorado of the United States. The United States Census Bureau estimates that the county population was 12,386 in 2006, a 25.14% increase since U.S. Census 2000...		33.960		East end of route