State Highway 91 is a stretch of highway

Highway

A highway is any public road. In American English, the term is common and almost always designates major roads. In British English, the term designates any road open to the public. Any interconnected set of highways can be variously referred to as a "highway system", a "highway network", or a...

 in 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...

 that connects Leadville

Leadville, Colorado

Leadville is a Statutory City that is the county seat of, and the only municipality in, Lake County, Colorado, United States. Situated at an elevation of , Leadville is the highest incorporated city and the second highest incorporated municipality in the United States...

 to Interstate 70 at Copper Mountain

Copper Mountain (Colorado)

Copper Mountain is a mountain located in Summit County, Colorado, about west of Denver on Interstate 70. Opened in late 1972, its most notable use is as a ski resort, owned and operated by Intrawest until Dec...

.

Route description

SH 91 stretches 22.5 miles (36.2 km), starting at its southern junction with U.S. Highway 24 near Leadville. It runs northeast over Fremont Pass

Fremont Pass (Colorado)

Fremont Pass is a high mountain pass in the Rocky Mountains of central Colorado in the United States.It forms the continental divide on the border between Lake County and Summit County. The pass is named for John C. Fremont, an explorer of the American West who discovered the pass while traversing...

, passing the ghost town

Ghost town

A ghost town is an abandoned town or city. A town often becomes a ghost town because the economic activity that supported it has failed, or due to natural or human-caused disasters such as floods, government actions, uncontrolled lawlessness, war, or nuclear disasters...

 of Climax

Climax, Colorado

Climax was an unincorporated mining village and a former U.S. Post Office located in Lake County, Colorado. Climax was known for its large molybdenum ore deposit. The former Climax Post Office had the ZIP Code 80429. Climax is located along the Continental Divide at an elevation of about 11,360 feet...

, home of the now-quiet Climax mine

Climax mine

The Climax mine, located in Climax, Colorado, United States, was a major molybdenum mine in Lake and Summit counties, Colorado. In its heyday, the Climax mine was the largest molybdenum mine in the world, and for many years it supplied three-fourths of the world's supply of molbdenum...

. Climax has shut down operations in Climax, but still runs the Henderson molybdenum mine

Henderson molybdenum mine

The Henderson molybdenum mine is a large underground molybdenum mine west of the town of Empire in Clear Creek County, Colorado, USA. The Henderson mine, which has produced molybdenum since 1976, is owned by Freeport-McMoRan....

 in Empire

Empire, Colorado

The historic Town of Empire is a Statutory Town located in Clear Creek County, Colorado, United States. The population was 355 at the U.S. Census 2000. The town is a former mining settlement that flourished during the Colorado Silver Boom in the late 19th century. It is located in the valley Clear...

.

SH 91 ends at its junction with I-70 at Wheeler Junction. Since the development of the Copper Mountain Ski Area, Wheeler Junction is more commonly referred to as Copper Mountain.

Major intersections

County	Location	Mile	Destination	Notes
Lake Lake County, Colorado Lake County is one of the 64 counties of the State of Colorado of the United States. The highest natural point in Colorado and the entire Rocky Mountains is the summit of Mount Elbert in Lake County at 14,440 feet elevation. The county population was 7,812 at U.S. Census 2000. The county seat...		0.000
Summit Summit County, Colorado Summit County is the 19th most populous of the 64 counties of the state of Colorado of the United States. The county population was 23,538 at U.S. Census 2000. The county seat is Breckenridge...		22.605		Interchange