Lava

Lassen National Forest · California · 5,978 acres · RoadlessArea Rule (2001)
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Observed Species (28)

Species with confirmed research-grade observation records from iNaturalist community science data.

American Sickle (1)
Astragalus curvicarpus
Baker's Cypress (2)
Hesperocyparis bakeri
California Coffeeberry (1)
Frangula californica
Desert Figwort (1)
Scrophularia desertorum
Desert-sweet (3)
Chamaebatiaria millefolium
Forked Tube Lichen (1)
Hypogymnia imshaugii
Greenleaf Manzanita (1)
Arctostaphylos patula
Hot-rock Beardtongue (1)
Penstemon deustus
Knobcone Pine (1)
Pinus attenuata
Lace Lipfern (1)
Myriopteris gracillima
Layne's Monkeyflower (1)
Diplacus layneae
Lobeleaf Groundsel (1)
Packera multilobata
Many-flower Snakelily (1)
Dichelostemma multiflorum
Oak Titmouse (1)
Baeolophus inornatus
Oceanspray (1)
Holodiscus discolor
One-seed Pussy-paws (2)
Calyptridium monospermum
Pacific Treefrog (1)
Pseudacris regilla
Pin Clover (1)
Erodium cicutarium
Purple Milkweed (4)
Asclepias cordifolia
Rough Sculpin (3)
Cottus asperrimus
Royal Beardtongue (2)
Penstemon speciosus
Sierra Jewelflower (1)
Streptanthus tortuosus
Tehama Navarretia (1)
Navarretia heterandra
Tobacco Ceanothus (1)
Ceanothus velutinus
Umbellate Bastard Toad-flax (1)
Comandra umbellata
Water Loosestrife (1)
Lysimachia thyrsiflora
Wavyleaf Indian-paintbrush (1)
Castilleja applegatei
Western Redbud (3)
Cercis occidentalis
Federally Listed Species (7)

Species identified by the U.S. Fish and Wildlife Service as potentially occurring within this area based on range and habitat data. These designations do not indicate confirmed presence — they identify habitat where agency actions may require consultation under the Endangered Species Act.

Northern Spotted Owl
Strix occidentalis caurinaThreatened
Shasta Crayfish
Pacifastacus fortisEndangered
California Condor
Gymnogyps californianusE, XN
Gray Wolf
Canis lupus
Monarch
Danaus plexippusProposed Threatened
Northwestern Pond Turtle
Actinemys marmorataProposed Threatened
Suckley's Cuckoo Bumble Bee
Bombus suckleyiProposed Endangered
Other Species of Concern (17)

Species identified by the U.S. Fish and Wildlife Service as potentially occurring based on range and habitat data.

American Avocet
Recurvirostra americana
American White Pelican
Pelecanus erythrorhynchos
Bald Eagle
Haliaeetus leucocephalus
Calliope Hummingbird
Selasphorus calliope
Cassin's Finch
Haemorhous cassinii
Evening Grosbeak
Coccothraustes vespertinus
Forster's Tern
Sterna forsteri
Franklin's Gull
Leucophaeus pipixcan
Golden Eagle
Aquila chrysaetos
Lesser Yellowlegs
Tringa flavipes
Lewis's Woodpecker
Melanerpes lewis
Northern Harrier
Circus hudsonius
Olive-sided Flycatcher
Contopus cooperi
Rufous Hummingbird
Selasphorus rufus
Sage Thrasher
Oreoscoptes montanus
Western Grebe
Aechmophorus occidentalis
Willet
Tringa semipalmata
Migratory Birds of Conservation Concern (16)

Birds of conservation concern identified by the U.S. Fish and Wildlife Service as potentially occurring based on range data. These species may warrant additional consideration under the Migratory Bird Treaty Act.

American Avocet
Recurvirostra americana
American White Pelican
Pelecanus erythrorhynchos
Bald Eagle
Haliaeetus leucocephalus
Calliope Hummingbird
Selasphorus calliope
Cassin's Finch
Haemorhous cassinii
Evening Grosbeak
Coccothraustes vespertinus
Forster's Tern
Sterna forsteri
Franklin's Gull
Leucophaeus pipixcan
Golden Eagle
Aquila chrysaetos
Lesser Yellowlegs
Tringa flavipes
Lewis's Woodpecker
Melanerpes lewis
Olive-sided Flycatcher
Contopus cooperi
Rufous Hummingbird
Selasphorus rufus
Sage Thrasher
Oreoscoptes montanus
Western Grebe
Aechmophorus occidentalis
Willet
Tringa semipalmata
Vegetation (6)

Composition from LANDFIRE 2024 EVT spatial analysis. Ecosystems classified per NatureServe Terrestrial Ecological Systems.

California Chaparral
Shrub / Shrubland · 823 ha
GNR34.0%
Pacific Northwest Wooded Lava Flow
Tree / Conifer · 684 ha
GNR28.3%
California Mountain Chaparral
Shrub / Shrubland · 462 ha
GNR19.1%
Sierra Nevada Cliff and Canyon
Sparse / Sparsely Vegetated · 344 ha
14.2%
California Mixed Conifer Forest
Tree / Conifer · 63 ha
GNR2.6%
North Pacific Active Volcanic Rock and Cinder Land
Sparse / Sparsely Vegetated · 25 ha
1.0%

Lava

Lava Roadless Area

Lassen National Forest, California · 5,978 acres