Roadless Areas
Home/Ecosystems/ Rocky Mountain Alpine Bedrock and Scree

Rocky Mountain Alpine Bedrock and Scree

EVT 9016
SparseSparsely vegetated
Roadless Areas (98)

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.

Montana (25)

AreaForestCoverageHectares
Storm LakeBeaverhead-Deerlodge National Forest25.5%963.72
Crazy MountainGallatin National Forest19.8%6,563.52
BeartoothCuster National Forest18.4%85.05
BeartoothGallatin National Forest9.5%203.4
West Big HoleBeaverhead-Deerlodge National Forest7.3%3,931.11
East PioneerBeaverhead-Deerlodge National Forest6.4%3,777.48
Italian PeakBeaverhead-Deerlodge National Forest4.3%1,584.72
Chico PeakGallatin National Forest4.0%174.69
Crazy MountainsLewis and Clark National Forest3.9%392.31
North AbsarokaCuster National Forest3.0%258.75
Flint Range / Dolus LakesBeaverhead-Deerlodge National Forest2.4%570.42
Bear - Marshall - Scapegoat - SwanLewis and Clark National Forest2.4%3,299.94
Cabin Creek Wildlife Management Area OcdGallatin National Forest2.0%281.25
LionheadGallatin National Forest1.9%256.77
Bear - Marshall - Scapegoat - SwanHelena National Forest1.4%282.15
North AbsarokaGallatin National Forest1.3%846.18
Snowcrest MountainBeaverhead-Deerlodge National Forest1.2%465.48
Hyalite - Porcupine - Buffalo Horn Wilderness Study AreaGallatin National Forest1.2%675.81
Upper East ForkBeaverhead-Deerlodge National Forest1.0%34.83
Middle Mtn. / Tobacco RootsBeaverhead-Deerlodge National Forest0.9%347.13
MadisonGallatin National Forest0.9%455.76
Bmss Ra 1485Flathead National Forest0.8%1,063.89
Line Creek PlateauCuster National Forest0.6%64.62
Gallatin FringeGallatin National Forest0.5%104.94
Bear - Marshall - Scapegoat - SwanLolo National Forest0.4%171.18

Nevada (12)

AreaForestCoverageHectares
Snake - Pole CynHumboldt-Toiyabe National Forest15.9%49.23
Humboldt - Checkers NEHumboldt-Toiyabe National Forest13.9%36
South SchellHumboldt-Toiyabe National Forest8.4%4,293.45
Humboldt - Checkers SEHumboldt-Toiyabe National Forest5.3%13.86
Ruby - Lamoille CynHumboldt-Toiyabe National Forest4.6%613.17
Humboldt - Angel LkHumboldt-Toiyabe National Forest2.6%10.8
Ruby - SegundaHumboldt-Toiyabe National Forest2.6%132.66
Bunker HillHumboldt-Toiyabe National Forest2.5%281.34
Ruby - Cold CkHumboldt-Toiyabe National Forest2.2%21.24
Snake - MurphyHumboldt-Toiyabe National Forest1.3%140.85
Pearl PeakHumboldt-Toiyabe National Forest1.2%335.52
Toiyabe RangeHumboldt-Toiyabe National Forest0.3%118.71

Oregon (6)

AreaForestCoverageHectares
Little SheepWallowa-Whitman National Forest3.7%79.47
Twin MountainWallowa-Whitman National Forest2.0%479.97
Boulder ParkWallowa-Whitman National Forest1.4%68.76
Little Eagle MeadowsWallowa-Whitman National Forest1.1%32.04
Greenhorn Mtn.Umatilla National Forest1.0%44.73
Greenhorn MountainMalheur National Forest0.7%44.73

Utah (28)

AreaForestCoverageHectares
Mt. PealeManti-Lasal National Forest31.5%1,225.08
Bullion - DelanoFishlake National Forest17.0%1,028.43
Horse Mountain - Mans PeakManti-Lasal National Forest16.8%1,507.41
418040Uinta National Forest16.5%113.49
White PineWasatch-Cache National Forest15.2%119.25
HeliotropeManti-Lasal National Forest14.1%258.03
0419020Ashley National Forest10.7%15,344.46
Black MountainManti-Lasal National Forest8.0%208.08
Fishlake MountainFishlake National Forest7.9%807.12
Tushar MountainFishlake National Forest5.5%898.29
White MountainManti-Lasal National Forest5.3%154.08
0401014Ashley National Forest4.4%481.5
Boulger - Black CanyonManti-Lasal National Forest4.4%414.45
Boulder Mtn. / Boulder Top / Deer LakeDixie National Forest3.9%1,727.28
LakesWasatch-Cache National Forest3.6%1,782.36
High Uintas (UT)Wasatch-Cache National Forest3.3%1,377.99
Big HorseshoeManti-Lasal National Forest3.2%224.82
Mt. Um Plateau - Mt TerrillFishlake National Forest2.7%189.9
Twelve Mile CreekManti-Lasal National Forest2.1%85.05
418024Uinta National Forest2.0%420.93
South MountainManti-Lasal National Forest1.9%114.12
Twin PeaksWasatch-Cache National Forest1.7%41.76
Mt. ArvineFishlake National Forest1.6%38.43
Big Bear CreekManti-Lasal National Forest1.5%176.22
Rolfson - StakerManti-Lasal National Forest1.4%40.05
Thousand Lake MountainFishlake National Forest0.8%86.31
Blue MountainManti-Lasal National Forest0.6%49.59
Signal PeakFishlake National Forest0.5%66.87

Wyoming (27)

AreaForestCoverageHectares
Beartooth Proposed WildernessShoshone National Forest28.9%1,965.42
Franc's PeakShoshone National Forest20.5%5,677.2
Dunoir Special Management UnitShoshone National Forest13.3%1,597.86
Headwaters Sunlight CreekShoshone National Forest13.1%317.97
South Wyoming RangeBridger-Teton National Forest12.1%4,210.92
Wood RiverShoshone National Forest11.6%2,386.8
Togwotee PassShoshone National Forest11.5%340.38
Phillips RidgeBridger-Teton National Forest10.9%443.97
South ForkShoshone National Forest9.7%2,540.07
Warm Spring CreekShoshone National Forest7.0%176.94
Salt River RangeBridger-Teton National Forest6.1%5,805
South Beartooth HighwayShoshone National Forest4.2%1,807.02
Mosquito Lake - Seven LakesBridger-Teton National Forest4.1%861.48
Snowy RangeMedicine Bow-Routt National Forest3.0%364.14
Trout CreekShoshone National Forest2.8%500.85
Wilderness Study AreaTarghee National Forest2.7%573.12
Pacific Creek - Blackrock CreekBridger-Teton National Forest2.7%270.72
East DunoirShoshone National Forest2.3%29.61
ReefShoshone National Forest2.2%151.02
Pat O'haraShoshone National Forest1.9%83.61
Sulphur CreekShoshone National Forest1.8%223.2
Grayback RidgeBridger-Teton National Forest1.5%1,805.04
Middle ForkShoshone National Forest1.4%289.44
Wapiti Valley SouthShoshone National Forest1.2%219.24
West Slope WindsBridger-Teton National Forest0.9%504.81
West Slope TetonsTarghee National Forest0.6%108.63
Lake Alice - Commissary RidgeBridger-Teton National Forest0.4%253.35
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.