Penney Ridge

Shasta-Trinity National Forest · California · 5,226 acres · RoadlessArea Rule (2001)
Take Action Now
Learn How You Can Help
Click map to expand
Observed Species (42)

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

Aquatic Gartersnake (3)
Thamnophis atratus
Bedstraw Broomrape (2)
Aphyllon epigalium
Bolander's Onion (1)
Allium bolanderi
Bowl-tube Iris (3)
Iris macrosiphon
California Poppy (1)
Eschscholzia californica
Chipping Sparrow (1)
Spizella passerina
Common Monkeyflower (1)
Erythranthe guttata
Common Yarrow (2)
Achillea millefolium
Crevice Alumroot (1)
Heuchera micrantha
Dark-eyed Junco (1)
Junco hyemalis
Doris Nile's Madia (1)
Harmonia doris-nilesiae
Dyer's Woad (1)
Isatis tinctoria
Fall Thistle (1)
Cirsium occidentale
Fork-toothed Ookow (1)
Dichelostemma congestum
Four-line Honeysuckle (1)
Lonicera involucrata
Giant Blue-eyed Mary (1)
Collinsia grandiflora
Harvest Brodiaea (1)
Brodiaea elegans
Hummingbird-trumpet (1)
Epilobium canum
Kellogg's Monkeyflower (2)
Diplacus kelloggii
Layne's Monkeyflower (1)
Diplacus layneae
Lovely Clarkia (1)
Clarkia concinna
Mexican Catchfly (1)
Silene laciniata
Mountain Whitethorn (1)
Ceanothus cordulatus
Musk Monkeyflower (1)
Erythranthe moschata
Narrowleaf Swordfern (1)
Polystichum imbricans
Northern Alligator Lizard (1)
Elgaria coerulea
Pacific Yew (2)
Taxus brevifolia
Red-osier Dogwood (1)
Cornus sericea
Red-stem Springbeauty (1)
Claytonia rubra
Scarlet Missionbells (2)
Fritillaria recurva
Scarlet Monkeyflower (1)
Erythranthe cardinalis
Serpentine Milkweed (1)
Asclepias solanoana
Sierra Fawn Lily (2)
Erythronium multiscapideum
Solomon's-plume (1)
Maianthemum racemosum
Spotted Towhee (1)
Pipilo maculatus
Spreading Dogbane (1)
Apocynum androsaemifolium
Tall White Bog Orchid (1)
Platanthera dilatata
Tongue Clarkia (1)
Clarkia rhomboidea
Veiled Polypore (1)
Cryptoporus volvatus
Woolly Indian-paintbrush (1)
Castilleja foliolosa
Yolla Bolly Bedstraw (1)
Galium ambiguum
a terrestrial slug (1)
Ariolimax buttoni
Federally Listed Species (8)

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.

Conservancy Fairy Shrimp
Branchinecta conservatioEndangered
Northern Spotted Owl
Strix occidentalis caurinaThreatened
Vernal Pool Fairy Shrimp
Branchinecta lynchiThreatened
Vernal Pool Tadpole Shrimp
Lepidurus packardiEndangered
California Condor
Gymnogyps californianusE, XN
Monarch
Danaus plexippusProposed Threatened
Northwestern Pond Turtle
Actinemys marmorataProposed Threatened
Yellow-billed Cuckoo
Coccyzus americanus
Other Species of Concern (1)

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

Oak Titmouse
Baeolophus inornatus
Migratory Birds of Conservation Concern (1)

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.

Oak Titmouse
Baeolophus inornatus
Vegetation (8)

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

California Mixed Conifer Forest
Tree / Conifer · 826 ha
GNR39.1%
California Mountain Chaparral
Shrub / Shrubland · 579 ha
GNR27.4%
California Chaparral
Shrub / Shrubland · 331 ha
GNR15.7%
California Mixed Conifer Forest
Tree / Conifer · 84 ha
GNR4.0%
California Mixed Evergreen Forest
Tree / Conifer · 67 ha
GNR3.2%
California High Mountain Meadow
Herb / Grassland · 50 ha
GNR2.4%
California Ruderal Grassland and Meadow
Herb / Exotic Herbaceous · 29 ha
1.4%

Penney Ridge

Penney Ridge Roadless Area

Shasta-Trinity National Forest, California · 5,226 acres