Denver & Rio Grande Railroad No. 661 is a class 120 2-8-0 "Consolidation" type locomotives were built in 1891 by the Baldwin Locomotive Works for the Rio Grande Western railroad as #142.
It was built for passenger and fright service on the Rio Grande Western railroad until transfer to the Denver & Rio Grande railroad and renumbered to #661 in 1908.
In December 1916 the locomotives served, and transfer the Indian Valley Railroad and renumbered as #1 until the railroad ceased operations and was scrapped in December 1939 when the locomotive retired.
