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Mastiff puppies and dogs in Lake Forest, California

Looking for a Mastiff puppy or dog in Lake Forest, California? Adopt a Pet can help you find an adorable Mastiff near you.

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Adopt a Mastiff near you Mastiff in cities near Lake Forest, California Other pups in Lake Forest, California Search for a Mastiff puppy or dog near you Browse Mastiff puppies and dogs in nearby cities Browse related breeds in Lake Forest, California Mastiff shelters and rescues in Lake Forest, California Learn more about adopting a Mastiff puppy or dog

Adopt a Mastiff near you in Lake Forest, California

These Mastiffs are available in Lake Forest, California.
Photo of Moose (Courtesy Post) - Adopt Me!

Moose (Courtesy Post) - Adopt Me!

Mastiff

Male, Adult
Lake Forest, CA
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with dogs, House-trained, Spayed or Neutered,
Story
This handsome big guy is Moose, a sweet 2-year-old pup tipping the scales at 97 lbs of love! Moose has had lots of training under his belt and is fully crate trained, walks beautifully on leash, and is great with other dogs.Moose is neutered, up-to-date on vaccines, and ready to find his forever home. While he’s made great progress, Moose is still a bit timid and sensitive, so he’s looking for a calmer household where he can continue to blossom at his own pace. Because of his gentle, shy nature, he’d do best in a home with older kids who understand how to give him space when he needs it.Moose would love a family who can provide a quiet, structured environment where he can feel safe, loved, and part of the pack. If you’re looking for a loyal, kind-hearted companion with a big heart (and paws to match!), Moose may be the one for you! Located in Los Angeles, CAMarch 7, 2026, 3:29 pm

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Or, how about these Mastiffs in cities near Lake Forest, California

These Mastiffs are available for adoption close to Lake Forest, California.
Photo of Moose (Courtesy Post) - Adopt Me!

Moose (Courtesy Post) - Adopt Me!

Mastiff

Male, Adult
Lake Forest, CA
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with dogs, House-trained, Spayed or Neutered,
Story
This handsome big guy is Moose, a sweet 2-year-old pup tipping the scales at 97 lbs of love! Moose has had lots of training under his belt and is fully crate trained, walks beautifully on leash, and is great with other dogs.Moose is neutered, up-to-date on vaccines, and ready to find his forever home. While he’s made great progress, Moose is still a bit timid and sensitive, so he’s looking for a calmer household where he can continue to blossom at his own pace. Because of his gentle, shy nature, he’d do best in a home with older kids who understand how to give him space when he needs it.Moose would love a family who can provide a quiet, structured environment where he can feel safe, loved, and part of the pack. If you’re looking for a loyal, kind-hearted companion with a big heart (and paws to match!), Moose may be the one for you! Located in Los Angeles, CAMarch 7, 2026, 3:29 pm

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Photo of CONAN

CONAN

Mastiff

Male, 2 yrs
Irvine, CA
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
Hi, I’m Conan — your classic blocky-headed lovebug with a marshmallow heart. I know I look like a tough guy, but I’m actually a sensitive soul. It takes me a little time to feel comfortable with new people, and I appreciate humans who let me get to know them at my own pace. Once I trust you, though, I’m all in: leaning my big head into your lap, wagging my whole body, and showing off my best goofy grin. I’m hoping for an adult-only home where life is calm and predictable, and where my humans understand that I’m worth every bit of patience. If you think we might be a good match, I’d really like to meet you!

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Photo of Baby Huey

Baby Huey

Mastiff

Male, 4 yrs 7 mos
Tustin, CA
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Spayed or Neutered,
Story
-

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Photo of Junior

Junior

Mastiff

Male, Adult
Irvine, CA
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, Good with cats, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Minty came to stay with me when his family of four years began recently having legal issues. I have been fostering him for a month and a half, he has had to learn some new rules, as we have a senior cat. But, he learns and cooperates well. He is such a beautiful dog for the breed. I don’t think there is anyone he couldn’t get along with, such a happy dog. I had him neutered on July 21st and all vet needs. He needs a home! ASAP It’s time for him to move on. 82lbs

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Photo of Rigby

Rigby

Mastiff

Male, 2 yrs 8 mos
Winchester, CA
Size
(when grown) -
Details
-
Story
I am a fun, loving boy who loves to play. My only fault is I do not realize my size. I think I am a lap dog. I am house trained, and good with most other dogs. I would prefer to meet potential companions before going to a new home. ##2427887##

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Photo of Charlie

Charlie

Mastiff

Male, 1 yr 10 mos
Huntington Beach, CA
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Charlie is a loving and gentle boy! He likes to go on walks and cuddle with people. He is being trained by Redemption Tails, and his adoption includes a consultation.

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Search for a Mastiff puppy or dog

Use the search tool below to browse adoptable Mastiff puppies and adults Mastiff in Lake Forest, California.

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Mastiff puppies and dogs in nearby cities

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Related breeds in Lake Forest, California

Bullmastiffs in Lake Forest, California Neapolitan Mastiffs in Lake Forest, California Saint Bernards in Lake Forest, California

Mastiff shelters & rescues in Lake Forest, California

There are animal shelters and rescues that focus specifically on finding great homes for Mastiff puppies in Lake Forest, California. Browse these Mastiff rescues and shelters below.

Here are a few organizations closest to you:

Rescue

4.6 miles

The Little Red Dog, Inc

Lake Forest, CA 92630

Pet Types: cats, dogs, rabbits, small animals

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Shelter

8.2 miles

Irvine Animal Care Center

6443 Oak Canyon, Irvine, CA 92618

Pet Types: cats, birds, dogs, rabbits, small animals

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Rescue

13.2 miles

No Stray Left Behind

Tustin, CA 92782

Pet Types: dogs

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Rescue

19.5 miles

All Paws K9 Rescue

Winchester, CA 92595

Pet Types: cats, dogs, horses

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Rescue

21.9 miles

TREAT Pet Rescue

Huntington Beach, CA 92646

Pet Types: cats, dogs

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Shelter

22.2 miles

Mary S. Roberts Pet Adoption Center

6165 Industrial Avenue, Riverside, CA 92504

Pet Types: cats, dogs

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Shelter

25.7 miles

Riverside County Animal Control - Riverside Shelter

6851 Van Buren Blvd, Jurupa Valley, CA 92509

Pet Types: cats, birds, dogs, farm animals, horses, rabbits, reptiles, small animals

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Shelter

27 miles

Moreno Valley Animal Shelter

14041 Elsworth St., Moreno Valley, CA 92553

Pet Types: cats, birds, dogs, rabbits, reptiles, small animals

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Shelter

27.4 miles

West End Shelter for Animals

Ontario, CA 91761

Pet Types: cats, dogs

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Rescue

29.3 miles

Angel Dog Alliance, NFP (CA)

Temecula, CA 92591

Pet Types: dogs

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Looking for a specific shelter or rescue?

If you're not seeing what you're looking for, try our shelter and rescue search. We have more than 17,000 organizations in our database with furry pals waiting for a new home!

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

We've got all the info you need on adopting and caring for a Mastiff puppy. Check out the links below for everything you ever wanted to know about Mastiff puppies and adults.

Mastiff basics

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Where do Mastiffs come from? How many types of Mastiffs are there? From the history of the breed to question about average height, weight and size, brush up on these basic facts about the Mastiff.

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