Mastiff Adoption in Atherton, CA: Mastiff Puppies for Sale in Atherton, CA

Adopt a Mastiff near you in Atherton, California

We don't see any Mastiffs available for adoption right now, but new adoptable pets are added every day. Try a different search below!

Or, how about these Mastiffs in cities near Atherton, California

These Mastiffs are available for adoption close to Atherton, California.

Romeo

Mastiff

Male, 7 yrs 4 mos

Palo Alto, CA

Size

(when grown) X-Large 101 lbs (46 kg) or more

Details

Not good with dogs, Not good with cats, Needs experienced adopter, House-trained, Spayed or Neutered, Shots are up-to-date,

Story

Romeo is very sweet 6 year old boy but the vets think he may be younger. He would love to be a family dog and definitely wants to find his forever home, but can be protective of his people and his space. That being said once he knows you are part of the family he listens very well and knows many commands, sit, stay, down, shake, wait. He is slow to warm up to new people but once he has been introduced to you he is a gentle giant and big couch potato that loves to cuddle. He also really enjoys going for a ride in the car. It is not recommended to have young kids due to his size. He is good on the leash and knows many commands but needs someone that is not afraid of his size and can properly handle him. Experienced adopter with larger breeds is a must. No other dogs or animals in the household and not a good candidate for crates.

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Rowan

Mastiff

Male, Young

Sunnyvale, CA

Size

(when grown) X-Large 101 lbs (46 kg) or more

Details

Spayed or Neutered, Shots are up-to-date,

Story

Personality: playful, curious âââBreed: mastiff mix Age: est DOB 11/11/25 ââWeight: 70lbs and growing ââSex: male Rescued from Tehama County Large, clumsy boy Playful with other dogs, but doesn't always realize his size A little nervous in new situations Doing great with crate training No accidents inside so far Easy on leash Large dog experience a must Www.coppersdream.org If you are interested in adopting this dog please visit this link to get the adoption process started. We hold adoption events from San Francisco to the South Bay. Most dogs will be ready to go home the day of the adoption event. We accept credit cards and cash for our adoption fees. While adoption events are a great showcase for these amazing dogs, you don't need an adoption event to adopt a dog. Check out our adoptable pups, submit an application, and then meet them at their foster home! We try to post the dogs that are attending on Facebook before the event, please visit and like us on Facebook. To View other dogs up for adoption please visit our website. August 26, 2026, 7:37 pm

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Zeus

Mastiff Mutt

Male, Adult

San Leandro, CA

Size

(when grown) Large 61-100 lbs (28-45 kg)

Details

House-trained, Spayed or Neutered, Shots are up-to-date,

Story

Zeus is an overall well-behaved and low-maintenance dog: house-trained, low energy, not destructive, not a barker, and usually just sleeps when left alone. He also loves play time, is very food-motivated, and knows some basic commands, like: sit, stay, shake, down, and come. Many dog sitters have even mentioned he’s one of their favorite dogs to care for.All of Zeus’ materials will be included, such as: remaining food and prescriptions, toys, leash, treats, bed, crate, and doggie bags.

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Hennessy

Mastiff American Pit Bull Terrier

Male, Puppy

San Jose, CA

Size

(when grown) Med. 26-60 lbs (12-27 kg)

Details

Good with kids, Good with dogs, House-trained, Spayed or Neutered, Shots are up-to-date,

Story

HelllooThis is Hennessy he is an extremely loyal easy going dog that just loves people and other dogs. He loves outdoor adventures and lazing on your lap, be careful he is extremely clingy and will follow you anywhere you go he’s extremely social! And loves humans big or small same goes for dogs :)My phone#: 408-677-9961

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PENNY

Mastiff

Female, 2 yrs 5 mos

Alameda, CA

Size

(when grown) Large 61-100 lbs (28-45 kg)

Details

Spayed or Neutered,

Story

• Loves affection• Playful, great to walk• Super splasherPenny arrived to us unsure of the world, but has since decided that after careful consideration, the world is actually pretty great!She is gorgeous, gentle, and sweeter than she probably wants you to know. Once she`s comfortable with you, her whole personality opens up: she`s easy to train, takes fetch extremely seriously, and in what may be the best discovery of her to date - she LOVES water. She`s a big fan of splashing around and throwing her tennis balls in. Penny is ready for a patient, loving home that can keep her playtime up and thriving. If you`re looking for a beautiful, big hearted, playful pup - she`s right here!

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Adam

Mastiff Mixed Breed (Medium)

Male, 2 yrs 4 mos

Oakland, CA

Size

(when grown) Large 61-100 lbs (28-45 kg)

Details

Spayed or Neutered,

Story

Adam is an 80-pound silly, calm and cuddly boy doing so well with his amazing\ foster who says her favorite qualities are his squishy, loveable face, his soft fur, and his smile. Adam walks well on leash and is eager to "sit" for his dinner. He gets along great with other dogs. He is calm, playful and has good manners and is not overly curious about cats. He is low energy but really enjoys going for walks and being let out to run and explore in a fenced area. Adam is protective of his family and property and, with proper introductions, is the most loyal and gentle guy! He needs an adopter who can guide him with boundaries and offer lots of socialization opportunities. Everyone who meets Adam falls in love with him! He's just waiting for the right one who's ready to provide him a stable and loving home. If that's you, please submit an application and a volunteer will be in touch! (HD)

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Mastiff puppies and dogs in Atherton, California

Learn More:

Adopt a Mastiff near you in Atherton, California

We don't see any Mastiffs available for adoption right now, but new adoptable pets are added every day. Try a different search below!

Or, how about these Mastiffs in cities near Atherton, California

These Mastiffs are available for adoption close to Atherton, California.

Search for a Mastiff puppy or dog

Mastiff puppies and dogs in nearby cities

Related breeds in Atherton, California

Mastiff shelters & rescues in Atherton, California

Looking for a specific shelter or rescue?

Want to learn more about adopting a Mastiff puppy or dog?

Mastiff basics

Mastiff basics