Roadless Areas
Home/Ecosystems/ California Ruderal Grassland and Meadow

California Ruderal Grassland and Meadow

EVT 9301
HerbExotic herbaceous
Roadless Areas (89)

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 (83)

AreaForestCoverageHectares
Greenhorn CreekSequoia National Forest34.7%3,962.97
Mill CreekSequoia National Forest17.1%1,915.92
Keddie RidgeLassen National Forest14.5%226.89
Lion RidgeSequoia National Forest12.8%273.6
Bucks LakePlumas National Forest12.7%35.1
Oat Mtn.Sequoia National Forest12.0%592.29
Big RocksLos Padres National Forest11.2%539.64
De La GuerraLos Padres National Forest10.7%234.36
Fox MountainLos Padres National Forest9.1%1,918.8
Kings RiverSierra National Forest7.9%1,698.3
Sycamore SpringsSierra National Forest7.8%317.25
Grizzly PeakPlumas National Forest7.6%191.7
PantherShasta-Trinity National Forest7.3%353.43
ThatcherMendocino National Forest7.2%485.28
North Fork Middle Fork American RiverTahoe National Forest7.0%318.96
Los Machos HillsLos Padres National Forest6.2%277.11
Lake EleanorShasta-Trinity National Forest5.8%9.36
ScodiesSequoia National Forest5.8%17.1
East BeegumShasta-Trinity National Forest5.8%197.91
Redcap Addition Rare ISix Rivers National Forest5.7%11.25
Tuolumne RiverStanislaus National Forest5.5%385.2
Middle ForkPlumas National Forest5.5%652.41
Rouse HillSan Bernardino National Forest5.5%304.47
IshiLassen National Forest4.8%423.81
Machesna MountainLos Padres National Forest4.7%233.91
West BeegumShasta-Trinity National Forest4.5%94.5
WestforkAngeles National Forest4.4%78.84
Chips CreekLassen National Forest4.4%517.95
Devils RockShasta-Trinity National Forest4.3%285.03
Indian CreekKlamath National Forest4.2%84.51
Bear CanyonLos Padres National Forest4.0%231.21
Bald RockPlumas National Forest4.0%75.24
Thomes CreekMendocino National Forest3.8%257.85
North Fork SmithSix Rivers National Forest3.8%585
Santa CruzLos Padres National Forest3.7%319.41
Mirada PimeLos Padres National Forest3.7%197.82
Tepusquet PeakLos Padres National Forest3.7%86.49
Pine CreekCleveland National Forest3.5%7.2
Big Butte ShinboneSix Rivers National Forest3.5%15.57
Mokelumne - SprattHumboldt-Toiyabe National Forest3.4%8.55
Elk CreekMendocino National Forest3.2%300.87
La BreaLos Padres National Forest3.2%180.72
Fish CanyonAngeles National Forest2.9%355.59
Stanley MountainLos Padres National Forest2.9%172.44
ChinquapinShasta-Trinity National Forest2.8%246.87
Magic MountainAngeles National Forest2.7%168.57
Black ButteMendocino National Forest2.6%160.74
MonoLos Padres National Forest2.1%244.08
Chips CreekPlumas National Forest2.1%111.69
Tom MartinKlamath National Forest2.1%77.31
KellySix Rivers National Forest2.0%41.67
Trumbull PeakStanislaus National Forest1.9%47.07
Garcia MountainLos Padres National Forest1.9%59.67
Malduce BuckhornLos Padres National Forest1.9%107.64
Mill CreekLassen National Forest1.9%56.97
WoolstaffSequoia National Forest1.7%289.98
EagleShasta-Trinity National Forest1.7%44.91
ChannellSequoia National Forest1.6%288.45
CamuesaLos Padres National Forest1.5%50.04
AntimonyLos Padres National Forest1.5%243.45
GrindstoneMendocino National Forest1.4%151.92
Snow MountainMendocino National Forest1.4%83.97
Deer MountainMendocino National Forest1.4%67.41
Black Mtn.Sequoia National Forest1.4%83.16
Penney RidgeShasta-Trinity National Forest1.4%28.71
Salt CreekSix Rivers National Forest1.3%51.12
ChicoSequoia National Forest1.3%206.19
Slate CreekShasta-Trinity National Forest1.2%33.48
Black MountainLos Padres National Forest1.2%82.8
Slate Mtn.Sequoia National Forest1.2%57.33
Duncan CanyonTahoe National Forest1.1%38.88
SoliderSix Rivers National Forest1.0%62.91
CuyamaLos Padres National Forest1.0%78.93
Orleans Mtn.Klamath National Forest1.0%194.31
MosesSequoia National Forest0.9%84.69
Polk SpringsLassen National Forest0.8%31.68
PattisonShasta-Trinity National Forest0.8%91.53
Mokelumne - Mt. BullionHumboldt-Toiyabe National Forest0.7%38.07
Caples CreekEldorado National Forest0.6%43.56
Devil GulchSierra National Forest0.5%65.88
RinconSequoia National Forest0.5%108
North Fork American RiverTahoe National Forest0.5%72
Sespe - FrazierLos Padres National Forest0.4%162.27

Oregon (6)

AreaForestCoverageHectares
North Fork SmithSiskiyou National Forests6.6%24.3
Little GraybackRogue River National Forests3.6%117
KinneyRogue River National Forests1.2%35.19
Nihwik MountainSiskiyou National Forests1.0%31.05
North KalmiopsisSiskiyou National Forests0.6%219.33
South KalmiopsisSiskiyou National Forests0.4%176.49
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.