Colorado State Highway 17

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State Highway 17

SH 17 highlighted in red
Route information
Maintained by CDOT
Length88.5 mi[1][a] (142.4 km)
Major junctions
South end NM 17 at New Mexico state line
Major intersections
North end US 285 south of Villa Grove
CountryUnited States
CountiesArchuleta, Conejos, Alamosa, Saguache
Highway system
  • Colorado State Highway System
SH 16 SH 21

State Highway 17 (SH 17) is an 88.5 mi (142.4 km)[a] state highway in southern Colorado, United States. SH 17's southern terminus is a continuation as New Mexico State Road 17 (NM 17) at the New Mexico state line, and the northern terminus is at U.S. Route 285 (US 285) south of Villa Grove.

Route description

SH 17 by Mogote with Los Mogotes in the background, May 2020

SH 17 is officially split into two parts by a stretch of concurrency with US 285. The first part of the highway begins in the south at the New Mexico state line where the road connects to New Mexico State Road 17. From the state line the road proceeds in a winding, generally easterly path over the San Juan Mountains via Cumbres Pass and La Manga Pass, both over 10,000 feet (3,000 m) in elevation. Along this section, the road offers access to Rio Grande National Forest and the many recreational activities it offers.

After leaving the national forest, the road continues east for approximately another 13 miles (21 km) before merging with US 285 at Antonito. From Antonito, SH 17 runs northward concurrently with US 285 for just over 30 miles (48 km) to the city of Alamosa. At Alamosa, the second part of SH 17 begins after the road splits from US 285. From there, the road proceeds northward up the middle of the San Luis Valley between the Sangre de Christo Mountains in the east and the San Juan Mountains to the west. The route passes through the towns of Mosca, Hooper (where the road meets the eastern end of SH 112) and Moffat before reaching its northern terminus where it again meets US 285 roughly five miles (8.0 km) south of Villa Grove.


SH 17 looking north toward Moffat from near Road T, May 2020

When the route was established in the 1920s, the route was broken into two sections. The road began at Pagosa Springs and began southeast and disappeared as the route ended at the New Mexico state line. The route then reappeared northeast and terminated at SH 15 (now moved) near Mineral Hot Springs. Within the northeast segment, the route from Antonito to Alamosa was paved by 1936. The portion of the eastern segment from the New Mexico state line to Antonito was deleted and readded by 1938 and 1946, respectively. The rest of the route, not included the segment from New Mexico to Antonito, was paved by 1954. In 1968, the sections of the highway that were concurrent with other highways were eliminated, leaving the two segments existent now. The route was paved by 1970.[2]

Major intersections

NM 17 south – Chama
Southern terimnus; continuation into New Mexico
US 285 south – Santa Fe, Tres Piedras
Southern end of US 285 concurrency
Gap along US 285
US 160 (Sixth Street) / US 285 north – Monte Vista
6th St. is a one-way street, inbound access only; northern end of US 285 concurrency; southern end of US 160 concurrency

US 160 west / US 285 north (Main Street west) – Monte Vista
Main St. is a one-way street, outbound access only; no northbound access
Rio Grande70.00112.65Bridge
Alamosa East70.12112.85
US 160 east – Walsenburg
Northern end of US 160 concurrency
county line
SH 112 west – Center
Eastern terminus of SH 112
Saguache118.86191.29 US 285 – Saguache, Monte Vista, Poncha Springs, SalidaNorthern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b The section of SH 17 which runs concurrently with US 285 is maintained with federal rather than state funds and is therefore not counted by the Colorado Department of Transportation in the road's official 88.5-mile (142.4 km) length; the total end-to-end length including this segment is 118.8 miles (191.2 km).[1]


  1. ^ a b "Segment Descriptions for Highway 17". Colorado Department of Transportation. Retrieved March 26, 2008.[dead link]
  2. ^ Salek, Matthew E. "Colorado Routes 1-19". Retrieved May 26, 2010.

External links