Characterized by a diverse mix of aspen and various conifers including spruce, fir and pine (as well as shrubs) occurring at a range of elevations between 5,000 and 10,000 feet.

This forest type may take a range of forms from open woodland to a more closed canopy forest, depending on the species composition, elevation, slope and aspect.

Depending on disturbance history, this forest type may maintain a balanced mix of aspen and conifer or transition between the two.

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Data Sources


NatureServe. 2018. International Ecological Classification Standard: Terrestrial Ecological Classifications. NatureServe Central Databases. Arlington, VA. U.S.A. Data current as of 28 August 2018.

2017 Colorado Wildfire Risk Assessment, Colorado State Forest Service.