1902-1906 - Florence Electric Street Railway Co.
1906-1907 - Canon City Florence & Royal Gorge Interurban Railway
1907-1910 - Canon City & Royal Gorge Railway
Durango
Horse Car
1890-1892 - Durango Street Railway
1892 - horse cars replaced with electric streetcars operated by new company
1892-1921 - Durango Railway & Realty Co.
1921 - streetcars discontinued
Grand Junction
Horse Car
1890-1896 - Grand Junction Street Car Co.
1896-1901 - Grand Junction Street Railway Co.
1901-1902 - City of Grand Junction
Electric Streetcar
1909-1914 - Grand Junction & Grand River Valley Railway Co.
1914-1926 - Grand River Valley Railway Co.
1926-1935 - Grand River Valley Railroad Co.
1928 - streetcars replaced with buses
HISTORIC INTERURBAN RAILWAY
Grand Junction-Fruita (1910-1928)
Greeley
After 1910 - Greeley & Denver Railroad Co.
1923 - streetcars replaced with buses
1920's-1950's - Greeley Transportation Co.
Loveland
Private bus co. in 1952 - Loveland City Bus Co.
Trinidad
Mule Car
1886-1887 - Trinidad Street Railroad Co.
1887-1893 - Trinidad Street Railway Co.
Electric Streetcar
1904-1908 - Trinidad Electric Railroad Co.
1908-1909 - Southern Colorado Power & Railway Co.
1909-1911 - Colorado Railway Light & Power Co.
1911-1923 - Trinidad Electric Transmission Railway & Gas Co.
1923 - streetcars discontinued
HISTORIC INTERURBAN RAILWAY
Trinidad-Cokedale/Starkville (1904-1923)
Aspen - Aspen City Railway Co. (1891-1895, horse)
Leadville - Leadville Street Railroad Co.