Horse Hill Mill Valley, CA

Horse Hill Mill Valley, CA

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Horse Hill preserve is Marin County Open Space, approx 55 acres of public pasture and trails with 14 privately owned horses cared for cooperatively by Alto Bowl Horse Owners Association.

09/08/2026

Is Ripp deceased, or just getting his beauty rest? Horses need sleep, just as we humans do. Being polyphasic sleepers, horses nap standing throughout the day, dozing with eyes at half-mast while their legs’ specialized stay apparatus keeps them upright with no muscle effort. Lateral recumbency (lying flat on one side or other) provides REM sleep which is essential for horses’ neurological and psychological health. Horses need a total of 2 - 4 hours of periodic sleep in various configurations (standing, sternal, lateral) every 24 hours. A horse deep in REM sleep depends on its standing herd mates to provide watchfulness against predators.

Occasionally, Hill visitors will call with concern about a “dead” horse. We always respond to check out every report, even as we are confident it’s just equine nap time. We locate, count and fully inspect the whole herd 1-2 times every day.

Some more about how and why horses sleep the way they do.
https://laylaroseranch.org/horse-101/horse-sleep/

Photos from Horse Hill Mill Valley, CA's post 08/31/2026

Penny and Pago

08/23/2026

# # # Please Do Not Feed the Horses

Someone recently decided to throw pumpkins into the pasture. While we understand that this may seem like a kind gesture, **please do not feed the horses**.

Feeding horses can create serious health and safety risks. They may fight over food, have allergies or dietary restrictions, or even choke on certain foods.

For the safety and well-being of all the horses, please do not leave or throw **carrots, apples, pumpkins, hay, straw, or any other food** into the pasture.

We truly appreciate your kindness and understanding. Thank you for helping us keep the horses safe and healthy!

08/22/2026

Riding in mill valley

08/22/2026

Someone's in a hurry..

08/22/2026

Angus rushing to get to his herd

08/22/2026

14 happy horses

08/16/2026

Beautiful Lillys aka naked ladies

08/16/2026

Our herd consists of 14 individual owned horses that are lucky enough to live on 55 acres of open space in the beautiful Bay Area

Photos from Horse Hill Mill Valley, CA's post 08/12/2026
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Location

Address


Lomita Drive
Mill Valley, CA
94941