With its headwaters near James Peak and Rogers and Rollins Passes, South Boulder Creek became a corridor for the Denver, Northwestern & Pacific Railway before the turn of the century. With the completion of the Moffat Tunnel in 1927 the railroad (which had become the Denver & Salt Lake Railroad had a short cut through the divide. Later, the Denver Water Board used a parallel tunnel to bring water through from the Western Slope, running the water down the South Boulder Creek Channel and storing it in Gross Reservoir before diverting it from the creek to supply Denver and its suburbs with water.

Image/Location	Date	Photographer	Source/Copyright
James Peak	between 1900-20	Harry H. Lake	DPL
Above Tolland	Unknown	Unknown	Library of Congress
Lake near Tolland	Unknown	Unknown	Library of Congress
Meadow west of Tolland	Unknown	Unknown	Library of Congress
Railroad tracks on South Boulder Creek	between 1900-20	Harry H. Lake	DPL
South Boulder Creek Canyon	1904	Louis Charles McClure	DPL
South Boulder Creek Canyon	1904	Louis Charles McClure	DPL