Dates below refer to the establishment of Forests or
major changes that affected Forest boundaries and/or administration.
Minor land additions, transfers, and eliminations are not noted. Data
are taken from Establishment and Modification of National Forest
Boundaries - A Chronologic Record 1891-1973; compiled by the
Division of Engineering, Washington D.C., October 1973. USDA, Forest
Service.
ARAPAHO NATIONAL FOREST |
Established from portions of Medicine Bow, Pikes Peak, and Leadville Forests | 7/1/08 |
COCHETOPA NATIONAL FOREST |
Cochetopah Forest Reserve | 6/13/05 |
Cochetopah National Forest | 3/4/07 |
Cochetopa National Forest | 7/1/08 |
Leadville Forest Reserve | 5/12/05 |
Leadville National Forest | 3/4/07 |
Combined with Arapaho, Cochetopa, and others | 5/26/30 |
Cochetopa - Distributed entire Forest among Gunnison, Rio Grande and San Isabel | 7/1/44 |
GRAND MESA NATIONAL FOREST |
Battlement Mesa Forest Reserve | 12/24/92 |
Battlement Mesa National Forest | 3/4/07 |
Battlement National Forest | 7/1/08 |
Grand Mesa National Forest | 3/11/24 |
Fruita Forest Reserve | 2/24/06 |
Fruita National Forest | 3/4/07 |
Combined with Uncompahgre | 7/1/08 |
Combined with Grand Mesa | 4/13/21 |
GUNNISON NATIONAL FOREST |
Gunnison Forest Reserve | 5/12/05 |
Gunnison National Forest | 3/4/07 |
HOLY CROSS NATIONAL FOREST |
Holy Cross Forest Reserve | 8/25/05 |
Holy Cross National Forest | 3/4/07 |
Sopris National Forest | 4/26/09 |
Combined with Holy Cross | 8/7/20 |
Holy Cross, transferred entire Forest to White River | 1/1/45 |
MONTEZUMA NATIONAL FOREST |
Montezuma Forest Reserve | 6/13/05 |
Montezuma National Forest | 3/4/07 |
Divided entire Forest between San Juan and Uncompahgre | 7/1/47 |
PIKE NATIONAL FOREST |
Pikes Peak Timber Land Reserve | 2/11/92 |
Pikes Peak Forest Reserve | 5/12/05 |
Pikes Peak National Forest | 3/04/07 |
Pike National Forest | 7/1/08 |
Plum Creek Timber Land Reserve | 6/23/92 |
South Platte Forest Reserve | 12/9/92 |
Combined with Pikes Peak | 5/12/05 |
RIO GRANDE NATIONAL FOREST |
Established from parts of San Juan and Cochetopah | 7/1/08 |
ROOSEVELT NATIONAL FOREST |
Medicine Bow Forest Reserve (Wyo.) | 5/22/02 |
Medicine Bow Forest Reserve (Wyo. & Colo.) | 5/17/05 |
Medicine Bow National Forest | 3/4/07 |
Medicine Bow National Forest (Colo.) | 7/1/08 |
Colorado National Forest | 7/1/10 |
Roosevelt National Forest | 3/28/32 |
ROUTT NATIONAL FOREST |
Park Range Forest Reserve | 6/12/05 |
Park Range National Forest | 3/4/07 |
Routt National Forest | 7/1/08 |
Sierra Madre Forest Reserve | 11/5/06 |
Sierra Madre National Forest | 3/4/07 |
Hayden National Forest (Colo. & Wyo.) | 7/1/08 |
Combined with Routt and Medicine Bow | 8/2/29 |
SAN ISABEL NATIONAL FOREST |
San Isabel Forest Reserve | 4/11/02 |
San Isabel National Forest | 3/4/07 |
Wet Mountains Forest Reserve | 6/12/05 |
Wet Mountains National Forest | 3/4/07 |
Combined with San Isabel | 7/2/08 |
Las Animas Forest Reserve (Colo. & N.M.) | 3/1/07 |
Las Animas National Forest (Colo. & N.M.) | 3/4/07 |
Combined with San Isabel | 5/27/10 |
SAN JUAN NATIONAL FOREST |
San Juan Forest Reserve | 6/5/05 |
San Juan National Forest | 3/4/07 |
Durango National Forest | 6/29/11 |
Combined with San Juan | 11/21/20 |
UNCOMPAHGRE NATIONAL FOREST |
Uncompahgre Forest Reserve | 6/14/05 |
Uncompahgre National Forest | 3/4/07 |
Fruita Forest Reserve | 2/24/06 |
Fruita National Forest | 3/4/07 |
Ouray Forest Reserve | 2/2/07 |
Ouray National Forest | 3/4/07 |
Combined with Uncompahgre | 7/1/08 |
WHITE RIVER NATIONAL FOREST |
White River Plateau Timber Land Reserve | 10/16/91 |
White River Forest Reserve | 6/28/02 |
White River National Forest | 3/4/07 |
La Sal Forest Reserve (Colo. and Utah) | 1/25/06 |
La Sal National Forest (Colo. and Utah) | 3/4/07 |
La Salle National Forest | 7/2/08 |
La Sal National Forest | 3/16/09 |
White River, added entire Holy Cross | 1/1/45 |
La Sal, transferred entire forest to Manti | 7/1/49 |
Manti, changed name to Manti-La Sal | 8/28/50 |