United States Department of Agriculture
Forest Service
National Headquarters
October 2014
San Gabriel Mountains National MonumentFact Sheet
• The San Gabriel Mountains National Monumentis the eighth Forest Service national monument.The Antiquities Act of 1906 grants the Presidentor Congress the authority to designate nationalmonuments in order to protect “objects ofhistoric or scientific interest.”
• Located primarily in the Angeles National Forest,the monument is 346,177 acres. The forest,including the monument, provides 70 percent ofthe open space to more than 15 million peopleliving within 90 minutes of the area, and providesa third of Los Angeles’ drinking water.
• Deep canyons, many with perennial streams,provide crucial habitat for rare and uniquewildlife, including the California condor, spottedowl, bighorn sheep, and 1,000-year-old limberpines.
• The National Monument is the heaviest used areaon the Angeles National Forest, which receivesmore than 4 million visitors per year. Thisnumber is expected to increase now that the areahas been designated a national monument.Hiking, biking, horseback riding, off-highwayvehicle use, fishing, hang-gliding, hunting andpicnicking are just a few of the recreationalactivities on the monument.
• In a region with limited open space, themountains are the backyard for many highlyurban and culturally diverse communities.National monument designation will also vastlyenhance recreational access, interpretive andenvironmental education and bolster alreadystrong partnerships between the Forest Serviceand neighboring communities.
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• Science and research have been and continue tobe an integral part of the monument. The historicMt. Wilson Observatory has hosted world-classscientists, including astronomer Edwin Hubble.The San Dimas Experimental Forest providescrucial scientific insghts into watersheds andaquatic science.
• The Forest Service mission is to sustain thehealth, diversity, and productivity of the Nation’sforests and grasslands to meet the needs ofpresent and future generations.
For more info go to http://go.usa.gov/wccH
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The mighty San Andreas Fault and other geological forces have shaped these steep and rugged mountains. The highest point in the San Gabriel Mountains is the 10,064-foot Mt. San Antonio, nicknamed Mt. Baldy.
The monument is rich with cultural and historic sites. There are more than 600 archeological sites within the monument, including two Native American rock art sites listed on the National Register of Historic Places.
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Iron Mtn
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Mt Lowe
Mt Islip
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Mt Wilson
Mt Lukens
Mt Harwood
Mt BurnhamMt Gleason
Waterman Mtn
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Mt Williamson
Mt San Antonio
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Mt Baden-Powell
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Sources: Esri, HERE, DeLorme, TomTom, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, EsriChina (Hong Kong), swisstopo, MapmyIndia, © OpenStreetMap contributors, and the GIS User Community
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ArcadiaLos Angeles
Bakersfield
Angeles NF
Vicinity Map
DisclaimerThe USDA Forest Service makes nowarranty, expressed or implied, regarding thedata displayed on this map, and reserves theright to correct, update, modify, or replace thisinformation without notification.
ReferencesMap prepared by the U.S. Forest Service withdata provided by the Angeles & SanBernadino National Forests.
For more information about this map, contactthe U.S. Forest Service.
Monument boundary area encompasses346,177 acres.
LegendMajor Roads
Secondary Roads
Basic Ownership
USDA FOREST SERVICE
NON-FS
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State 0 5 102.5Miles
San Gabriel Mountains National MonumentFinal Boundary
ÜFinal Boundary
