Roadless Areas
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Inter-Mountain Basins Cliff and Canyon

EVT 9006
SparseSparsely vegetated
Roadless Areas (57)

Inventoried Roadless Areas where this ecosystem is present, identified from LANDFIRE 2024 Existing Vegetation Type spatial analysis. Coverage indicates the proportion of each area occupied by this ecosystem type.

California (19)

AreaForestCoverageHectares
LavasModoc National Forest12.5%1,304.55
Mono CratersInyo National Forest10.2%293.31
PaiuteInyo National Forest7.6%1,814.31
Callahan FlowModoc National Forest6.7%178.38
Soldier CanyonInyo National Forest5.9%971.01
HortonInyo National Forest5.0%114.66
Dobie FlatModoc National Forest4.9%298.26
Callahan FlowKlamath National Forest4.4%57.42
WattersonInyo National Forest4.2%117.99
Big CanyonModoc National Forest3.6%95.31
Birch CreekInyo National Forest2.9%341.1
Black CanyonInyo National Forest1.8%240.03
Andrews Mtn.Inyo National Forest1.6%63.09
Boundary Peak (CA)Inyo National Forest1.5%1,300.23
Benton RangeInyo National Forest1.1%41.4
Hoover - Green Ck NoHumboldt-Toiyabe National Forest0.9%27.18
Dexter CanyonInyo National Forest0.9%61.56
Wheeler RidgeInyo National Forest0.7%42.3
Excelsior (CA)Inyo National Forest0.5%84.6

Montana (2)

AreaForestCoverageHectares
Middleman Mountain / Hedges MountainHelena National Forest1.0%127.53
Cayuse MountainHelena National Forest0.8%69.3

Nevada (13)

AreaForestCoverageHectares
Pine Grove NorthHumboldt-Toiyabe National Forest5.9%208.62
Moriah - Hendrys Ck.Humboldt-Toiyabe National Forest4.7%44.46
Santa RosaHumboldt-Toiyabe National Forest4.2%924.21
SaulsburyHumboldt-Toiyabe National Forest1.7%212.76
Cabin CreekHumboldt-Toiyabe National Forest1.6%67.5
South Fork QuinnHumboldt-Toiyabe National Forest1.5%249.48
Mahogany RidgeHumboldt-Toiyabe National Forest1.2%83.52
Rough CreekHumboldt-Toiyabe National Forest1.2%41.67
ButtermilkHumboldt-Toiyabe National Forest1.2%91.26
Boundary Peak (NV)Inyo National Forest1.2%102.78
Bank SpringsHumboldt-Toiyabe National Forest0.8%61.2
East Fork QuinnHumboldt-Toiyabe National Forest0.8%102.87
NorthumberlandHumboldt-Toiyabe National Forest0.8%73.89

Oregon (12)

AreaForestCoverageHectares
Devil's GardenWinema National Forest28.1%58.32
Metolius BreaksDeschutes National Forest12.9%582.03
Brattain ButteFremont National Forest10.6%255.87
BuckhornWallowa-Whitman National Forest4.1%285.12
Sheep DivideWallowa-Whitman National Forest2.8%184.5
Snake RiverWallowa-Whitman National Forest2.8%350.28
Mountain SheepWallowa-Whitman National Forest2.7%215.91
Deschutes / Steelhead CanyonOchoco National Forest0.9%39.69
DeadhorseWallowa-Whitman National Forest0.9%37.17
Imnaha FaceWallowa-Whitman National Forest0.6%67.41
Lord Flat Somers PointWallowa-Whitman National Forest0.5%145.17
Joseph CanyonWallowa-Whitman National Forest0.5%51.21

Utah (3)

AreaForestCoverageHectares
Oak CreekFishlake National Forest2.3%499.86
Flat CanyonFishlake National Forest1.0%34.47
Beehive PeakFishlake National Forest0.9%214.02

Washington (2)

AreaForestCoverageHectares
Black CanyonWenatchee National Forest13.6%9.72
Black CanyonOkanogan National Forest3.2%123.93

Wyoming (6)

AreaForestCoverageHectares
0401019Ashley National Forest13.0%327.33
0401018Ashley National Forest5.2%129.6
0401035Ashley National Forest4.1%91.26
0401021Ashley National Forest3.0%62.37
0401036Ashley National Forest1.4%35.73
Little Popo AgieShoshone National Forest1.1%36.81
Methodology and Data Sources

Ecosystem classification: Ecosystems are classified using the LANDFIRE 2024 Existing Vegetation Type (EVT) layer, mapped to NatureServe Terrestrial Ecological Systems via a curated crosswalk. Each EVT is linked to the USNVC (U.S. National Vegetation Classification) hierarchy through pixel-level co-occurrence analysis of LANDFIRE EVT and NatureServe IVC Group rasters across all roadless areas.

Vegetation coverage: Coverage percentages and hectares are derived from zonal statistics of the LANDFIRE 2024 EVT raster intersected with roadless area boundaries.

Ecosystem narratives and community species: Sourced from the NatureServe Explorer API, representing professional ecological assessments of vegetation composition, environmental setting, dynamics, threats, and characteristic species assemblages.

IVC hierarchy: The International Vegetation Classification hierarchy is sourced from the USNVC v3.0 Catalog, providing the full classification from Biome through Association levels.

Component associations: Plant community associations listed as components of each NatureServe Ecological System. Association data from the NatureServe Explorer API.

State ranks: Conservation status ranks assigned by NatureServe member programs in each state where the ecosystem occurs.