| title | creator | language | description | tableOfContents | contributor | subject | created |
| Wild Life on the Rockies | Mills, Enos Abijah, 1870-1922 | en | | | | Mills, Enos Abijah, 1870-1922; Pioneers -- Colorado -- Biography; Natural history -- Colorado; Rocky Mountains; Colorado -- Description and travel; Colorado -- Biography; Rocky Mountain National Park (Colo.) -- History | 2009-04-12 |
| The Romance of the Colorado River
The Story of its Discovery in 1840, with an Account of the Later Explorations, and with Special Reference to the Voyages of Powell through the Line of the Great Canyons | Dellenbaugh, Frederick Samuel, 1853-1935 | en | | | | Powell, John Wesley, 1834-1902; Colorado River (Colo.-Mexico) -- Description and travel; Colorado River (Colo.-Mexico) -- Discovery and exploration; Colorado River Valley (Colo.-Mexico) -- Description and travel; Colorado River Valley (Colo.-Mexico) -- Discovery and exploration; Grand Canyon (Ariz.) -- Description and travel; Grand Canyon (Ariz.) -- Discovery and exploration | 2003-08-01 |
| A Mountain Boyhood | Mills, Joe, 1880-1935 | en | | | Comstock, Enos B. (Enos Benjamin), 1879-1945 [Illustrator] | Mills, Joe, 1880-1935 -- Childhood and youth; Pioneers -- Colorado -- Biography; Natural history -- Colorado; Estes Park Region (Colo.) -- Social life and customs; Colorado -- Biography; Longs Peak (Colo.); Rocky Mountain National Park (Colo.) -- History | 2009-08-12 |
| Canyons of the Colorado | Powell, John Wesley, 1834-1902 | en | | | | Colorado River (Colo.-Mexico); Grand Canyon (Ariz.); United States -- Discovery and exploration | 2005-05-01 |
| A Gold Hunter's Experience | Hambleton, Chalkley J., 1829- | en | | | | Hambleton, Chalkley J., b. 1829; Gold mines and mining -- Colorado -- Pikes Peak Region -- History -- 19th century; Pioneers -- Colorado -- Pikes Peak Region -- Biography; Pikes Peak Region (Colo.) -- Gold discoveries | 2009-07-06 |
| Two New Pocket Gophers from Wyoming and Colorado | | en | | | | Pocket gophers; Mammals -- Wyoming; Mammals -- Colorado | 2009-06-17 |
| Mammals of Mesa Verde National Park, Colorado | Anderson, Sydney, 1927- | en | | | | | 2010-01-21 |
| Mammals of the Grand Mesa, Colorado | Anderson, Sydney, 1927- | en | | | | | 2010-02-15 |
| A Prairie Infanta | Brodhead, Eva Wilder, 1870-1915 | en | | | | Western stories; Colorado -- Juvenile fiction | 2009-10-10 |
| Money Magic
A Novel | Garland, Hamlin, 1860-1940 | en | | | | Western stories; Colorado -- Fiction | 2009-10-23 |
| The Young Engineers in Colorado
Or, At Railwood Building in Earnest | Hancock, H. Irving (Harrie Irving), 1868-1922 | en | | | | | 2004-06-25 |
| The Grand Cañon of the Colorado | Muir, John, 1838-1914 | en | | | | | 2004-05-01 |
| The Forester's Daughter
A Romance of the Bear-Tooth Range | Garland, Hamlin, 1860-1940 | en | | | | Western stories; Young women -- Fiction; Colorado -- Fiction | 2008-08-09 |
| Records of the Fossil Mammal Sinclairella, Family Apatemyidae, From the Chadronian and Orellan | Clemens, William Alvin | en | | | | Sinclairella dakotensis; Paleontology -- Oligocene; Paleontology -- Colorado -- Logan County; Paleontology -- Nebraska -- Sioux County | 2009-10-20 |
| Little Masterpieces of Science: Explorers | | en | | Columbus discovers America / Winsor, J. -- Arrival at the Pacific ocean, 1805 / Lewis and Clarke -- The sources of the Mississippi, 1806 / Pike, Z. M. -- Manila in 1842 / Wilkes, C. -- The ascent of Mount Tyndall / King, C. -- The grand cañon of the Colorado is explored / Powell, J. W. | Iles, George, 1852-1942 [Editor] | | 2009-07-24 |
| Colorado Jim | Goodchild, George, 1888- | en | | | | | 2008-12-08 |
| The Boys of Crawford's Basin
The Story of a Mountain Ranch in the Early Days of Colorado | Hamp, Sidford F. (Sidford Frederick), 1855-1919 | en | | | Emerson, Chase [Illustrator] | Western stories; Ranches -- Juvenile fiction; Colorado -- Juvenile fiction | 2008-08-26 |
| Dangers of the Trail in 1865
A Narrative of Actual Events | Young, Charles E. (Charles Edward), 1846- | en | | | Patterson, H. DeF. [Illustrator] | West (U.S.) -- Description and travel; Colorado -- Description and travel | 2008-10-28 |
| Birds of the Rockies | Keyser, Leander S. (Leander Sylvester), 1856-1937 | en | | | | Birds; Birds -- Colorado | 2008-07-05 |
| The Song of the Lark | Cather, Willa Sibert, 1873-1947 | en | | | | Bildungsromans; Musical fiction; Colorado -- Fiction; Chicago (Ill.) -- Fiction; Opera -- Fiction; Young women -- Fiction; Swedish Americans -- Fiction; Children of clergy -- Fiction; Women singers -- Fiction | 2008-06-27 |
| Peak and Prairie
From a Colorado Sketch-book | Fuller, Anna, 1853-1916 | en | | Preface -- A pilgrim in the far West -- Brian Boru -- Jake Stanwood's gal -- At the Keith ranch -- The Rumpety case -- The Lame Gulch professor -- The boss of the wheel -- Mr. Fetherbee's adventure -- An amateur gamble -- A Rocky Mountain shipwreck -- A stroke in the game -- The blizzard picnic -- A golden vista. | Moore, Emma G. [Illustrator] | Frontier and pioneer life -- Fiction; Colorado -- Social life and customs -- Fiction | 2007-08-03 |
| Steep Trails
California, Utah, Nevada, Washington, Oregon, the Grand Canyon | Muir, John, 1838-1914 | en | | Wild wool -- A geologist's winter walk -- Summer days at Mount Shasta -- A perilous night on Shasta's summit -- Shasta rambles and Modoc memories -- The city of the Saints -- A great storm in Utah -- Bathing in Salt Lake-- Mormon lilies -- The San Gabriel Valley -- The San Gabriel Mountains -- Nevada farms -- Nevada forests -- Nevada's timber belt -- Glacial phenomena in Nevada -- Nevada's dead towns -- Puget Sound -- The forests of Washington --People and towns of Puget Sound -- An ascent of Mount Rainier -- The physical and climatic characteristics of Oregon -- The forests of Oregon and their inhabitants -- The rivers of Oregon -- The Grand Canyon of the Colorado. | Badè, William Frederic, 1871-1936 [Editor] | West (U.S.) -- Description and travel; Shasta, Mount (Calif. : Mountain); Forests and forestry -- West (U.S.) | 1995-09-01 |