Official websites use .gov
A .gov
website belongs to an official government organization in the
United States.
Secure .gov websites use HTTPS
A lock
(
) or https:// means you've safely
connected to the .gov website. Share sensitive information only
on official, secure websites.
Nature & Science
San Dimas Experimental Forest
Established in 1933, the San Dimas Experimental Forest is the only such forest in southern California. It covers 6,945 ha in the front range of the San Gabriel Mountains, located about 50 km northeast of Los Angeles. The San Dimas Experimental Forest is within the boundary of the Angeles National Forest - San Gabriel Mountains National Monument. Originally established as an outdoor hydrologic laboratory to document and quantify the water cycle in semi-arid steep lands, most of the facilities were constructed by the Depression-era Civilian Conservation Corps and Work Projects Administration labor programs. San Dimas has a long history as a research site in the fields of hydrology and ecology and is recognized as a Biosphere Reserve by UNESCO's Man and the Biosphere program. San Dimas also contains the Fern Canyon Research Natural Area.
Features
State & Private Forestry
The State and Private Forestry (S&PF) organization of the USDA Forest Service reach across the boundaries of National Forests to States, Tribes, communities, and non-industrial private landowners.
Angeles National Forest Wildland Fire Terminology
The following glossary contains fire terms. The entire glossary is in ABC order and is readable by scrolling down, or by skipping to a particular section by selecting a letter.
Alerts & Warnings
- Fire Danger is ‘VERY HIGH’ at the Angeles National Forest
- Bridge Fire (w/ temporary road closures)
- NEW! Office & Visitor Center Updates - Need Info or Passes?
- Some Trails Closed into San Bernardino Nat'l Forest from Mt Baldy/High Elevation
- Safety Advisories for Heaton Flats / Iron Mountain Trail
- Forest Service Road Closures
- Big Santa Anita Canyon (Chantry Flats) in Sierra Madre/Arcadia Closed thru Oct 1
- Closure: Williamson Rock Area Closed thru Dec. 31, 2026
- Fire Danger is ‘HIGH’ at the Angeles National Forest
- Closure: West Fork Road closed to recreationists on weekdays thru Dec. 1, 2024
- Planning to Camp? (Stay Limits/Dispersed Camping Restrictions) til Dec. 15, 2024