State Route 151, 157, 157, and 165 in Colorado

State Route 151 in Colorado

Get started Ignacio
End Pagosa Springs
Length 34 mi
Length 55 km


State Route 151, commonly known as State Highway 151 or SH 151 is a state route in the U.S. state of Colorado. The road forms an east-west route through the south of the state, from Ignacio to west of Pagosa Springs. SH 151 is 55 kilometers long.

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Travel directions

SH 151 begins in an agricultural valley in the village of Ignacio on SH 172 and then winds south, just past the New Mexico state border . The road leads through Navajo State Park, then turns northeast, where the area is more mountainous. A side road leads to the archaeological sites around Chimney Rock. SH 151 then ends well west of the town of Pagosa Springs on US 160.


SH 151 is one of the original 1920s state highways. The route originally ran only from the New Mexico state border at Arboles to US 160 west of Pagosa Springs. In 1954, the terminus was changed to Arboles itself, where the road crossed SH 172. The road was paved in the mid-1960s. In 1972, the section between Ignacio and Arboles also became part of SH 151.

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Traffic intensities

3,200 vehicles drive daily in Ignacio, gradually decreasing to 1,100 vehicles in the Navajo State Park near Arboles. The portion further up to US 160 only handles 800 vehicles per day.

State Route 157 in Colorado

Get started boulder
End boulder
Length 3.7 mi
Length 6.0 km
Table Mesa Drive

Baseline Road

Colorado Avenue

Arapahoe Avenue

Pearl Parkway

Valmont Road

Diagonal Highway

State Route 157, commonly known as State Highway 157 or SH 157 is a state route in the U.S. state of Colorado. The road forms a north-south route through the town of Boulder and is also known as Foothills Parkway. SH 157 is 6 kilometers long.

Travel directions

The Foothills Parkway.

SH 157 connects two major Boulder arterial roads, US 36 from Denver and SH 119 (Diagonal Highway) from Longmont. SH 157 is an urban arterial with mostly 2×2 lanes. The intersections are well spaced apart and there are no secondary roads connecting to SH 157 between the major intersections. Some connections are grade separated, including interchanges with US 36 and SH 119 at the start and end points.


The original SH 157 was formed in the 1920’s and then ran across the High Plains, from near Colorado Springs via Falcon and Elbert to Kiowa. In 1936 the part west of Falcon was already deleted. In 1954-1955 the road was handed over to the counties.

Planning for a Foothills Parkway along the east side of Boulder began in the early 1970s. SH 157 was listed in the 1971 route log, but the road had not yet been built. Originally, there were also plans to extend the road south of US 36 with an arc to SH 93, as a southern bypass of Boulder. The road was built in phases north from US 36. In 1975, the southernmost section opened between US 36 and Baseline Road. An extension opened in 1980 to Arapahoe Avenue (SH 7), to Pearl Parkway in 1984, to Valmont Road in 1988, and to Diagonal Highway (SH 119) in 1989.

SH 157 is laid out in such a way that it is quite easy to turn it into a freeway. There is sufficient space around the intersections for a reconstruction to a grade-separated connection, and almost all intersections are at a considerable distance from each other without local access to homes and side streets. However, road construction has little priority in Boulder.

Traffic intensities

SH 157 is driven intensively, with 39,000 to 49,000 vehicles per day on the entire route.

State Route 159 in Colorado

Get started New Mexico state line
End Fort Garland
Length 34 mi
Length 54 km
New Mexico NM-522San Luis

Fort Garland

State Route 159, commonly known as State Highway 159 or SH 159 is a state route in the U.S. state of Colorado. The road forms a north-south route in the central south of the state, from the New Mexico state border to Fort Garland. SH 159 is 54 kilometers long.

Travel directions

The terminus of SH 159 at Fort Garland.

SH 159 begins near the village of Costilla on the New Mexico state border. SH 159 heads north through the east side of the immense San Luis Valley, which is more than 50 miles wide here. Directly to the east is the Culebra Range, with peaks up to 4,200 meters. There are only two villages on the route of SH 159, San Luis and the terminus of Fort Garland. Within sight of the prominent Sangre de Cristo Mountains, SH 159 ends at US 160.


SH 159 is one of the original state highways from the 1920s. The road was paved in the 1930s. The route has not changed since then.

Traffic intensities

700 vehicles pass the border with the state of New Mexico every day. Furthermore, mostly 1,500 to 3,000 vehicles drive on SH 159, with the busiest point in San Luis.

State Route 165 in Colorado

Get started Silver Cliff
End Colorado City
Length 37 mi
Length 60 km

Colorado City

State Route 165, commonly known as State Highway 165 or SH 165 is a state route in the U.S. state of Colorado. The road backs out through the Wet Mountains southwest of Pueblo. SH 165 is 60 kilometers long.

Travel directions

SH 165 begins 15 miles east of Silver Cliff at an intersection with SH 96 and then heads south through the Wet Mountains. In the mountains, the road usually runs at 2,500 to 2,800 meters without clear mountain passes. The road leads through sparsely populated areas, there are no places on the route until one leaves the Wet Mountains. To the south, the 3,763-foot-tall Greenhorn Mountain is dominant. At the base of this mountain, SH 165 curves east and passes through the hamlet of Rye to reach the High Plains. The road here gradually descends to 1,800 meters in Colorado City. Shortly thereafter, SH 165 ends at Interstate 25.


SH 165 is one of the original state highways of the 1920s. It was initially more of a north-south route, from SH 76 (current SH 78) to US 85 in Crow. The road was tarred between Rye and Crow in 1938. In 1954, much of it was handed over to the county, leaving only the portion between Rye and US 85. In 1955-1957, SH 165 was extended to SH 96. The road was completely asphalted in 1964. The road has little importance for through traffic.

Traffic intensities

On the north-south part, usually only 400 vehicles a day. The section between Rye and Colorado City is slightly busier with 2,500 to 4,000 vehicles.

State Route 165 in Colorado