Dotsero is an unincorporated community and a census-designated place (CDP) located in and governed by Eagle County, Colorado, United States.

Originally the line passed through Dotsero following the Eagle River towards Tennessee Pass and through the Royal Gorge of the Arkansas River en route to Pueblo, Colorado before turning north towards Denver.

Through the years, efforts were made to have a more direct connection between Denver and Salt Lake that did not require detouring through Pueblo.

[citation needed] The station name exists from the construction of the standard gauge railroad line to Glenwood Springs in the 1890s.

[9] The main industry at Dotsero for years consisted of making cinderblocks from the volcano.