• Rocky Mountain Research Station
• 240 West Prospect
• Fort Collins, CO 80526
• (970) 498-1100

Experimental Forests

The Rocky Mountain Research Station administers and conducts research on 14 experimental forests and ranges:

• Black Hills Experimental Forest (South Dakota) - silviculture of ponderosa pine, mountain pine beetle, and wildlife habitat.
• Boise Basin Experimental Forest (Idaho) - old-growth restoration, prescribed fire, and root-system structures.
• Coram Experimental Forest (Montana) - forest regeneration, wildlife, climate and hydrology.
• Deception Creek Experimental Forest (Idaho) - sedimentation, forest genetics, root disease, small tree utilization, and fire effects.
• Desert Experimental Range (Utah) - cold desert plant communities, desertification, sheep management, rodent ecology, pronghorn antelope, soils, and bird and mammal populations.
• Fort Valley Experimental Forest (Arizona) - forest pathology, forest restoration, wildland-urban interface studies, and fire effects.
• Fraser Experimental Forest (Colorado) - nutrient cycling, snow hydrology, ecosystem carbon storage, climate, streamflow, and water chemistry.
• GLEES (Glacier Lake Ecosystem Experiments Site) (Wyoming) - seedling germination, nitrogen deposition, riparian hydrology, disturbance dynamics, tree growth, atmospheric pollutants.
• Great Basin Experimental Range (Utah) - plant adaptation and succession, nutrient cycling, revegetation, restoration ecology, and game habitat.
• Long Valley Experimental Forest (Arizona) - ponderosa pine, burning interval effects, tree growth history.
• Manitou Experimental Forest (Colorado) - ponderosa pine ecosystems, fire, insect and bird biology, dwarf mistletoe, and wildland-urban interface issues.
• Priest River Experimental Forest (Idaho) - woody debris, soil productivity, acid deposition, seedling development, water yield and quality, and wood decomposition.
• Sierra Ancha Experimental Forest (Arizona) - long-term hydrologic studies.
• Tenderfoot Creek Experimental Forest (Montana) - hydrology, climate, and regenerating and restoring lodgepole pine.

Experimental forests and ranges (and other experimental areas within this network) remain as some of the few places where ecological research can be maintained over the long term. This kind of protection allows for experiments that can last longer than an individual scientist's career. For example, at the H.J. Andrews Experimental Forest in Oregon, a study of log decomposition that was established in 1982 is expected to last for 200 years! The existence of these experimental forests and ranges allows for long-term data to be collected, and for us to learn how forests change over time as climate and other factors change. At the Bartlett Experimental Forest in New Hampshire, 500 growth plots were laid in a grid across the forest in 1931. Remeasurements of these plots have helped us better learn how to manage forests that are dynamic and subject to a variety of stresses over time. Because experimental forests and ranges often encompass whole watersheds and large areas, it is possible to do landscape-scale experiments. Finally, operating as a network of ecological research sites representing a wide range of forest and range types allows scientists to conduct cross-site comparisons, to help leverage funding, and to evaluate landscape patterns and processes at landscape to regional scales.

Experimental forests and ranges are extremely varied, and are located throughout the United States and Puerto Rico. They are as small as 47 ha (Kawishiwi Experimental Forest in Minnesota) and as large as 22,500 ha (Desert Experimental Range in Utah). They range from boreal forests (Bonanza Creek Experimental Forest in Alaska) to tropical forests (Luquillo Experimental Forest in Puerto Rico) to dry desert ranges (Great Basin Experimental Range in Utah). Long-term records on many of these experimental forests and ranges date back to the 1930s when 29 of the 77 were established. The oldest research records date back to 1911 (Priest River Experimental Forest in Idaho) and 1912 (Great Basin Experimental Range in Utah), whereas the newest experimental forests were designated in the early 1970s (McCormick Experimental Forest in 1970 and Entiat Experimental Forest in 1971). Such diversity is a hallmark and a strength of the network of experimental forests and ranges.

Adams, Mary Beth; Loughry, Linda; Plaugher, Linda, comps. 2004. Experimental Forests and Ranges of the USDA Forest Service. Gen. Tech. Rep. NE-321. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 178 p. GTR-NE-321 - 5.5 mb pdf

Information has been updated since original publication.