Yes, you can find ticks in California. They live in coastal forests, oak woodlands, chaparral, grasslands, foothills, and mountain areas.
Your risk goes up when you brush against vegetation or bring an attached tick home on clothing, gear, or a pet.
California’s tick season usually becomes busiest after winter rains, especially during spring and early summer. Ticks can remain active whenever weather and habitat conditions are favorable.
Learn which species live near your destination, check yourself and your pets, and remove attached ticks promptly to enjoy the outdoors more safely.
Common California Ticks And Where They Live
California’s tick habitats range from damp woodland and leaf litter to dry grass, chaparral, foothills, and mountain trails. Species vary by region, elevation, wildlife hosts, and moisture levels.
You may encounter different risks along the coast, inland, or near the Sierra foothills.
Western Blacklegged Tick And Lyme Risk
The western blacklegged tick carries Lyme disease in California. It lives in coastal ranges, oak woodlands, foothills, and Sierra foothill habitats, where leaf litter, rodents, deer, and moderate moisture create suitable conditions.
Immature ticks can be extremely small and may feed on mice or other small mammals. Adults attach to people, dogs, and deer.
Lyme disease in California is less common than in the Northeast, but exposure remains possible in suitable areas.
Rocky Mountain Wood Tick In Inland And Northeastern Areas
The Rocky Mountain wood tick lives in inland mountain and foothill regions, including parts of northeastern California. It often becomes active during spring and may transmit Rocky Mountain spotted fever, Colorado tick fever, and tularemia.
This species does not spread Lyme disease in California. If you develop fever, headache, chills, muscle aches, fatigue, or a rash after a bite, seek medical attention.
Pacific Coast, American Dog, And Brown Dog Ticks
The Pacific Coast tick lives across many California habitats and may transmit Pacific Coast tick fever. The American dog tick can spread Rocky Mountain spotted fever and tularemia.
The brown dog tick is closely linked to dogs, kennels, homes, and warmer urban environments. It can complete much of its life cycle indoors.
If you repeatedly find ticks on a pet, inspect bedding, crates, resting areas, and indoor cracks.
The California guide to common ticks and their diseases provides identification details and species-specific health information.
Tick-Borne Illness Risks In The State
Not every tick carries a pathogen. The risk depends on the species, location, pathogen, and length of attachment.
California’s recognized tick-borne illnesses include Lyme disease, Rocky Mountain spotted fever, Colorado tick fever, tularemia, and other infections.
Lyme Disease In California
Lyme disease in California is primarily linked to the western blacklegged tick. Possible symptoms include an expanding rash, fever, fatigue, headache, muscle pain, and joint pain.
A bull’s-eye pattern does not appear in every case. If you develop symptoms after a tick bite, tell your healthcare professional where the exposure occurred, how long the tick may have been attached, and whether you have a photo.
Rocky Mountain Spotted Fever, Colorado Tick Fever, And Tularemia
Rocky Mountain spotted fever can begin with fever, headache, chills, muscle pain, nausea, fatigue, or a rash. It can become serious quickly, so seek prompt medical evaluation if these symptoms appear after a bite.
Colorado tick fever commonly causes a feverish illness with headache, chills, body aches, and fatigue. Tularemia can cause fever, swollen glands, an ulcer at the bite site, or other symptoms depending on how the infection occurred.
The California Department of Public Health’s disease information notes that only some California tick species commonly bite people, though several can transmit disease.
When California Tick Activity Is Highest
Tick activity changes with rainfall, temperature, elevation, vegetation, and host-animal activity. You may encounter ticks during any season, though wetter, cooler periods often create the most favorable surface conditions.
Spring Activity Across Inland And Foothill Habitats
Tick season in California often increases after winter rains. Spring and early summer bring abundant grass, leaf litter, and small-mammal activity, supporting more ticks in coastal ranges, oak woodland, foothills, and inland mountain habitats.
Nymphal western blacklegged ticks are especially easy to miss because of their tiny size. During hot, dry weather, surface activity may decline, but shaded vegetation, creek corridors, and damp woodland can still support ticks.
Coastal And Late-Season Exposure Patterns
Coastal California can support tick activity during cooler or wetter periods outside the typical spring peak. Northern coastal areas may have suitable conditions during winter.
Shaded canyons, riparian vegetation, and oak habitats can remain favorable later in the year. Southern California also has ticks in chaparral, coastal canyons, oak woodland, greenbelts, and other areas where vegetation and wildlife overlap.
The state prevention guidance recommends precautions whenever you enter likely tick habitat, regardless of the month.
Preventing Bites And Responding To A Tick
You can lower your risk with repellent, protective clothing, trail awareness, and prompt checks after outdoor activities. Fast removal limits the time a tick remains attached.
Using DEET And Permethrin Safely
Apply an Environmental Protection Agency-registered repellent containing DEET, picaridin, or another approved ingredient to exposed skin according to its label. Treat clothing and gear with permethrin products made for that purpose, following the product directions carefully.
Wear light-colored long pants, tuck your pants into socks, and choose closed shoes. Stay near the center of maintained trails, avoid brushing against tall grass and low brush, and keep jackets or backpacks off vegetation.
Tick Checks, Pet Protection, And Proper Removal
Check yourself, children, and pets as soon as you return indoors. Pay close attention to ankles, behind the knees, waist, groin, underarms, scalp, hairline, ears, your dog’s collar area, ears, toes, neck, and between the legs.
Use clean, fine-tipped tweezers to grasp an attached tick close to the skin. Pull upward with steady, even pressure, then clean the bite and your hands with soap and water or antiseptic.
Do not burn a tick, cover it with petroleum jelly, or apply chemicals to force it out.
Use veterinarian-recommended tick prevention for pets. If you find repeated ticks indoors, inspect pet bedding, crates, resting areas, and likely household hiding places.
Symptoms That Need Medical Attention
Monitor your health for several weeks after a bite.
Seek medical care for fever, headache, unusual fatigue, joint or muscle pain, swollen glands, a spreading rash, facial weakness, breathing difficulty, or new weakness.
If you feel seriously ill, contact a medical professional right away. Tell your clinician when and where the bite happened, how long the tick stayed attached, and whether you saved a photo or the tick.
Contact your veterinarian promptly if your pet develops weakness, fever, appetite loss, or unusual behavior.
