Horse Hill Preserve

• Enjoy observing the fourteen horses that live on Horse Hill, which is leased by the Alto Bowl Horseowners Association. Do not feed or approach the horses.
• Climb to the top of Horse Hill Fire Road. On a clear day you can see views of Mount Tam, the Tiburon Peninsula, and San Francisco Bay.
• In winter, seasonal springs run on the south slope.
• The Hill is a favorite field trip for local schools, introducing kids to Marin's agricultural traditions.
• Travel through to the Alto Bowl Preserve and points beyond.
• Dogs are welcome. Dogs must be leashed on trail, and under voice command on fire roads, with leash readily available.

• In spring, look for lupine, blue-eyed grass, and Douglas iris wildflowers.
• Circling overhead are raptors, including American kestrel, red-tailed hawk, and northern harrier, who feed on a healthy population of voles.

• Stay on roads and trails to preserve sensitive ecosystems and to avoid trespassing on private property.
• Be courteous and safety conscious when sharing roads and trails. Go slow and say hello.
• Dress appropriately for the weather. Trails can be muddy during rainy season.
• Bring water.
• There are no restrooms at this location.
• Steer clear of poison oak.
• After an outing, check for ticks.

East access: from Hwy 101 in Mill Valley, take the exit for E Blithedale Ave east. Turn right onto Tower Dr, right onto Plaza Dr, veer left on Plaza, right onto Lomita Dr, and follow to end (dead end).

West access: Same as above, except MCOSD gate is on the right, before Lomita Dr ends.

Street parking only. Please be respectful of local residents.

• Golden Gate Highway and Transportation District
• Marin Transit Trip Planner
• Route from San Rafael Transit Center

You can also dial 511 to find out about transit options from your location.

• No smoking or fires.
• Weapons and hunting prohibited.
• Motorized vehicles prohibited. (Individuals with qualified disabilities may operate certain kinds of zero-emission mobility devices on some roads,multiuse trails, and certain other facilities.)
• Everyone must yield the right-of-way to horses. Bikes must also yield to pedestrians.
• No model airplanes, drones, or other self-propelled crafts.
• Permit required for commercial use and groups of more than 15 people.
• Dispose of waste property. Pack it out.
• All resources are protected. Do not follow, approach, or feed wildlife.

DOGS

• Dogs may be off-leash on fire roads only if kept under voice control. Leash must always be readily available.
• Dogs are allowed on signed trails and must be leashed. Leash must not exceed 6 feet in length.
• Off-fire road and off-trail use prohibited.
• Individuals accompanying dogs are required to clean up and remove pet waste.
• A maximum of 3 dogs per person is allowed. No commercial dog walking permitted in this preserve.

BIKES

• Permitted on signed fire roads and trails designated for multiuse and hikers/bikes.
• Off-fire road and off-trail use prohibited.
• Speed limit is 15 mph or less. Must slow to 5 mph when passing others or around blind turns.
• Electric bicycles are not permitted.

HORSES

• Permitted on signed fire roads and trails designated for multiuse and hikers/horses.
• Off-fire road and off-trail use prohibited except when watering or resting the horse.

In an emergency, call 911. To report an incident or suspicious activity, call the Ranger Field Office at (415) 473-2816 or submit an Incident Report via online form.

Visitors are responsible for knowing and obeying all Marin County Open Space District (MCOSD) regulations. Citations will be issued for violations. Read the official regulations: Marin County Municipal Code Appendix A.

Call (415) 473-6387 for more information regarding allowable types and use of mobility devices for people with qualified disabilities.

The MCOSD is a special district pursuant to the California Public Resources Code. Marin County Parks oversees the management of the county parks system and provides public information on behalf of the MCOSD.