LENGTH

0.8 mi

ELEVATION GAIN

154 ft

DIFFICULTY

Difficult

TAGS:

Frank G. Bonelli Regional Park and all trails within the park are closed. The high-voltage transformer that provided Bonelli Park with electricity failed on May 5, 2025 and is unrepairable. LA County Parks is working with a contractor to replace the transformer. The park has been temporarily closed because there is no electricity, no running water and no bathrooms.

The Tree Line Trail is a 0.78 mile long trail in Frank G. Bonelli Regional Park with ample shade and picturesque views. The trail is ideal for users looking for moderate exercise.

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TRAIL INFORMATION
ALLOWED USES:
  • Hiking
  • Mountain Biking
  • Horseback Riding
  • Dogs on Leash
CONTACT INFO:
County of Los Angeles
626-588-5364

trails@parks.lacounty.gov

LINKS:
LOCAL WEATHER:
Cloudy
78° / 59°

Moderate

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TRAIL MAP
ELEVATION PROFILE

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NEARBY TRAILS
...
Bonelli Trail
...
Kikos Trail
...
Vargus Trail
...
Park View Trail
...
Antonovich Trail
FLORA & FAUNA
California Ground Squirrel
Otospermophilus beecheyi
Acorn Woodpecker
Melanerpes formicivorus
American Coot
Fulica americana
American Crow
Corvus brachyrhynchos
American Kestrel
Falco sparverius
American Peregrine Falcon
Falco peregrinus
Bigberry Manzanita
Arctostaphylos glauca
Bigleaf Maple
Acer macrophyllum
Black Mustard
Brassica nigra
Black Sage
Saliva mellifera
Black-chinned Hummingbird
Archilochus alexandri
California Black Walnut
Juglans californica
California Brown Pelican
Pelecanus occidentalis
California Buckwheat
Eriogonum fasciculatum
California Coffeeberry
Frangula californica
California Dodder
Cruscuta californica
California Lilacs
Ceanothus spp.
California Poppy
Eschscholzia californica
California Sagebrush
Artemisia californica
California Scrub Jay
Aphelocoma californica
California Sycamore
Platanus racemosa
California Tarantula
Aphonopelma sp.
Canada Goose
Branta canadensis
Chamise
Adenostoma fasciculatum
Cinnamon Teal
Anas cyanoptera
Coast Live Oak
Quercus agrifolia
Coast Range Newt
Taricha torosa
Common Carp
Cyprinus carpio
Cooper's Hawk
Accipiter cooperii
Coyote
Canis latrans
Coyote Brush
Baccharis pilularis
Crayfish
Astacoidea spp.
Garter Snake
Thamnophis hammondii
Gertsch's Socalchemmis Spider
Socalchemmis gertschi
Great Blue Heron
Ardea herodias
Greater Roadrunner
Geococcyx californianus
Green Sunfish
Lepomis cyanellus
Hollyleaf Cherry
Prunus ilicifolia
Indian Paintbrush
Castilleja gleasoni
Laurel Sumac
Malosma laurina
Lemonade Berry
Rhus integrifolia
Los Angeles Pocket Mouse
Perognathus spp.
Lupine
Lupinus albifrons
Monarch Butterfly
Danaus plexippus
Monkey Flower
Mimulus aurantiacus
Mugwort
Artemisia douglasiana
Muscovy Duck
Cairina moschata
Narrow-leaved Milkweed
Asclepias fascicularis
Pacific Rattlesnake
Crotalus viridis
Poison Oak
Toxicodendron diverisloba
Purple Sage
Salvia leucophylla
Red Tail Hawk
Buteo jamaicensis
Silvery Blue
Glaucopsyche lygdamus
Snowy Egret
Egretta thula
Striped Skunk
Mephitis mephitis
Sugar Bush
Rhus ovata
Summer Holly
Comarostaphylis diversifolia
Toyon
Heteromeles arbutifolia
Turkey Vulture
Cathartes aura
Valley Oak
Quercus lobata
Western Grey Squirrel
Sciurus griseus
White Alder
Alnus rhombifolia
White Sage
Salvia apiana
Willow Flycatcher
Empidonax traillii
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