An Isolated Empire: A History of Northwest Colorado

Athearn, Frederic J. An Isolated Empire: A History of Northwest Colorado. Denver: Colorado State Office, Bureau of Land Management, 1976.

This useful government publication contains the following chapters:

1. Northwestern Colorado Prior to Exploration
2. The Fur Trade
3. Exploration in Northwestern Colorado
4. Mining and Transportation in Early Western Colorado
5. Confrontations: Settlement Versus the Ute Indians
6. Settlement in Middle Park and the Yampa Valley
7. Development of the Cattle and Sheep Industry
8. Mining and Transportation 1890-1920
9. The "Moffat Road" and Northwestern Colorado, 1903-1948
10. Development of Northwestern Colorado 1890-1940

It can be found online in the HathiTrust Digital Library or in many Federal Depository Library Program libraries.