Colorado Narrow Gauge

San Luis & Rio Grande Railroad (standard gauge, since 1899)

Alamosa to La Veta

• 2007 Route Description

Cumbres and Toltec Scenic

• 2005 Route Description

Durango & Silverton Narrow Gauge

• 2005 Route Description

Leadville, Colorado and Southern (standard gauge since ??)

• 2005 Route Description

Georgetown Loop

• 2007 Route Description