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You are here: Planning > Zoning & Overlay Maps > Geologic Hazard Maps

Geologic Hazard Maps

Regional Index Maps

CHDH C (Northwest portion of the County)
EHFH C (Southwest portion of the County)
CIDI C (Northwest portion just to the east of CHDH C)
EIFI C (Southwest portion just to the east of EHFH C)
CJDJ C (Northeast portion just to the west of CKDK C)
EJFJ C (Southeast portion just to the west of EKFK C)
CKDK C (Northeast portion of the County)
EKFK C (Southeast portion of the County)

Regional Geologic Hazard Maps

Valley Region Maps
Mountain Region Maps
Desert Region Maps


Applications Accepted


Valley Region

 Bloomington FH29C  Montclair  FH27C
 Chino FH27C  Muscoy  FH22C
 Colton FH30C  Rancho Cucamonga  FH20C, FH21C
 Crafton FH31C, FH32C  Redlands  FH31C
 Del Rosa FH23C  Rialto  FH21C, FH22C, FH29C
 Devore FH21C  San Cntonio Heights  FH19C
 Fontana FH29C  San Bernardino  FH21C, FH22C
 Grand Terrace FH30C  Upland  FH19C
 Highland FH23C, FH30C, FH32C  Verdemont  FH21C, FH22C
 Loma Linda FH30C, FH31C  Yucaipa  FH32C
 Mentone FH31C, FH32C    

Mountain Region 
 Angles Oaks  FI17C  Holcomb Valley  FH16C, FI09C
 Arrowbear  FH24C  Lake Arrowhead  FH15C, FH23C
 Baldwin Lake  FI10C  Lake Gregory  FH22C
 Barton Flats  FI17C, FI18C  Lytle Creek  FH12C, FH13C, FH20C, FH21C
 Big Bear City (Bear Valley)  FI09C, FI10C, FI17C, FI18C  Mount Baldy  FH11C, FH12C, FH19C
 Big Bear Lake  FI16C, FI17C, FI18C  Oak Glen  FH32C, FI25C
 Blue Jay  FI15C, FH23C  Rim Forest  FH23C
 Cedar Glen  FH15C  Running Springs  FH15C, FH23C
 Cedarpines Park  FH14C. FH22C  Silverwood  FH14C
 Crestline  FH22C, FH23C  Sky Forest  FH23C
 Erwin Lake  FI10C, FI18C  Sugarloaf  FI10C, FI18C
 Fawnskin  FI09C  Twin Peaks  FH23C
 Forest Falls  FI25C (Click here for detailed mud flow and rockfall hazard maps)  Valley of Enchantment  FH22C
 Fredalba  FH23C  West Cajon Valley  FH12C
 Green Valley Lake  FH15C, FH16C, FH24C   Wrightwood   FH11C, FH12C

Desert Region
Adelanto  EHFHC  Ludlow EIFIC
Amboy EJFJC  Morongo Valley FI28C, FI29C
Apple Valley EH31C, FH07C, FH08C  Needles EKFK C
Baker CIDIC  Newberry Springs EI03C, EI11C, EI12C
Baldy Mesa EHFHC  Oak Hills FH14C
Barstow EH16C  Oro Grande EHFHC
Cadiz EJFJC  Parker Dam EKFKC
Cima CJDJC  Phelan    EHFHC
Daggett EI09C, EI10C  Pinon Hills EHFHC
El Mirage EHFHC  Pioneertown FI21C
Essex EJFJC  Red Mountain  CHDHC
Flamingo Heights FI21C  Rimrock EIFIC
Goffs EJFJC  Silver Lakes  EHFHC
Harvard EI03C  Spring Valley Lake EHFHC
Havasu EKFK C  Summit Valley FH14C
Helendale EHFHC  Trona CHDHC
Hesperia FH07C, FH14C, FH15C  Twentynine Palms FI15C, FI16C, FI23C, FI24C, FJ17C, FJ25C
Hinkley EH08C  Victorville EHFHC
Johnson Valley FI04C  Vidal EKFKC
Joshua Tree FI15C, FI22C, FI23C, FI30C, FI31C  Vidal Junction  EKFKC
Kelso CJDJC  Wonder Valley FJ17C
Kramer CHDHC, EHFHC  Yermo EI02C
Landers FI13C, FI14C  Yucca Mesa FI21C
Lenwood EH08C  Yucca Valley FI21C, FI28C, FI29C
Lucerne Valley EH32CFH08C, FI01C, FI02C, FI03C, FI09C, FI10C  



Forest Falls Detail Maps

Landslide Hazard Identification Map Number 43

Plate A-1: Distribution of Large Rockfall Boulders

Plate A-2: Relative Rockfall Hazard Areas

Plate B-1: Drainages and Watersheds

Plate B-2: Debris Flow Runout Potential