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Mastiff puppies and dogs in Boulder, Colorado

Looking for a Mastiff puppy or dog in Boulder, Colorado? 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 Boulder, Colorado Other pups in Boulder, Colorado Search for a Mastiff puppy or dog near you Browse Mastiff puppies and dogs in nearby cities Browse related breeds in Boulder, Colorado Mastiff shelters and rescues in Boulder, Colorado Learn more about adopting a Mastiff puppy or dog

Adopt a Mastiff near you in Boulder, Colorado

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 Boulder, Colorado

These Mastiffs are available for adoption close to Boulder, Colorado.
We'll also keep you updated on Barnaby's adoption status with email updates.
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Barnaby

Mastiff

Male, 3 yrs
Mead, CO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with kids, Good with dogs, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet your new oversized shadow with a heart of gold 💛 This 4-5 year-old English Mastiff is basically a real-life version of The Beast—big, lovable, and way less intimidating once you get to know him. At a petite 180 lbs, he firmly believes he’s a lap dog. He does great with both kids and adults. He loves to lean into his pets (all 180 pounds of him), and if you dare to stop, he’ll gently place a paw on you as a polite reminder to keep going. He’s a social guy who gets along well with dogs of all sizes, from tiny sidekicks to fellow giants. And while he may look like he could run a marathon, he actually tires out pretty quickly so expect short bursts of play followed by legendary naps. He’s an enthusiastic passenger for any and all car rides, too! A few bonus features: Drools like a champion (seriously, keep a towel handy) Gives world-class cuddles Doubles as a weighted blanket If you’re looking for a gentle giant who will adore your family, charm your friends, and leave a little drool trail of love wherever he goes, this is your guy. Barnaby is being fostered in Broomfield, Colorado. *We require all adopters to come to Colorado to adopt. *We do not transport dogs.* You can view this wonderful dog at https://www.milehighcanine.org/post/dogs/barnaby/. You can apply for our wonderful dogs at https://www.milehighcanine.org/adopt/adoption-application/.

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We'll also keep you updated on Cooper's adoption status with email updates.
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Cooper

Mastiff

Male, Young
Commerce City, CO
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
About Cooper Cooper has been part of our family for almost 4 years, and he is truly an amazing dog. He is very friendly, loving, and enjoys being around people. He is well-behaved and fully house-trained — he knows to do his business outside. We made the difficult decision to rehome him some time ago due to severe allergies in our youngest child. Thankfully, he stayed within our extended family, so we have always known he was safe and loved. Unfortunately, due to health reasons, the family member who has been caring for him can no longer keep him. Because of this, we are now looking for a new loving and responsible home for Cooper. He deserves a family that can give him the attention, care, and love he is used to. He is a wonderful companion and will make a great addition to the right home.

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We'll also keep you updated on Sabrina's adoption status with email updates.
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No photo available for Sabrina

Sabrina

Mastiff American Bulldog

Female, 7 yrs 7 mos
Boulder, CO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Needs special attention, Needs experienced adopter, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet Sabrina, a gentle 6-year-old Mastiff mix who’s in need of a special forever home. Sabrina is living with mast cell tumors (MCT) due to cancer and is currently on medication to keep her as comfortable as possible. She requires a loving home that is prepared to offer her hospice care and a peaceful environment. Sabrina can be shy with new people and may give a warning growl or snap if approached when she’s not ready. However, once she builds trust, she becomes deeply affectionate and very attached to her people. She gets along well with mellow dogs and will thrive in a calm household where she can feel safe and loved. If you have a compassionate heart and are ready to provide a supportive and caring home for a special dog like Sabrina, you’ll find a loyal and loving companion in her.

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We'll also keep you updated on NALA's adoption status with email updates.
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NALA

Mastiff

Female, 6 mos
Denver, CO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Spayed or Neutered,
Story
Came in with A430806Initially shy and can be vocal. Loves people and good at meeting other dogs.

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We'll also keep you updated on Tenille's adoption status with email updates.
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Tenille

Mastiff

Female, 4 yrs 9 mos
Aurora, CO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
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Story
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We'll also keep you updated on Daisey's adoption status with email updates.
Photo of Daisey

Daisey

Mastiff

Female, 6 yrs 1 mo
Windsor, CO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with dogs, Good with cats,
Story
Daisey is a beautiful English mastiff who hails from Oklahoma and is timid at first but loves the loves when she warms up. She is a sweet, quiet companion who doesn’t really understand a true family home life (yet). She is still figuring it out, as she desperately wants the connection but hasn’t had it before as she was a former breeder mamma. When she was of no more use, they took her to a kill shelter where Big Bones stepped in and brought her here to Colorado for a fresh start on life. She is learning new things like stairs and bath time. She has made friends with her foster siblings, and is such a sweet girl. If you are looking for a no frills, low maintenance type of dog, Daisey is your best bet.

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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 Boulder, Colorado.

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Mastiff puppies and dogs in nearby cities

Mastiff Puppies near me Mastiff in Arvada, CO Mastiff in Aurora, CO Mastiff in Berthoud, CO Mastiff in Brighton, CO Mastiff in Broomfield, CO Mastiff in Centennial, CO Mastiff in Cherry Hills Village, CO Mastiff in Commerce City, CO Mastiff in Denver, CO Mastiff in Edgewater, CO Mastiff in Englewood, CO Mastiff in Erie, CO Mastiff in Estes Park, CO Mastiff in Federal Heights, CO Mastiff in Firestone, CO Mastiff in Fort Lupton, CO Mastiff in Frederick, CO Mastiff in Golden, CO Mastiff in Greenwood Village, CO Mastiff in Johnstown, CO Mastiff in Lafayette, CO Mastiff in Lakewood, CO Mastiff in Littleton, CO Mastiff in Longmont, CO Mastiff in Louisville, CO Mastiff in Loveland, CO Mastiff in Milliken, CO Mastiff in Northglenn, CO Mastiff in Sheridan, CO Mastiff in Superior, CO Mastiff in Thornton, CO Mastiff in Westminster, CO Mastiff in Wheat Ridge, CO

Related breeds in Boulder, Colorado

Bullmastiffs in Boulder, Colorado Neapolitan Mastiffs in Boulder, Colorado Saint Bernards in Boulder, Colorado

Mastiff shelters & rescues in Boulder, Colorado

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

Here are a few organizations closest to you:

Rescue

19 miles

Mile High Canine Rescue, Inc.

Mead, CO 80542

Pet Types: dogs

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Rescue

23.1 miles

Ace of Hearts Dog Rescue - CO Transport Stop

711 Walnut St, Boulder, CO 80203

Pet Types: dogs

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Shelter

24.5 miles

Denver Animal Shelter

1241 W. Bayaud Ave, Denver, CO 80223

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

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Rescue

34.6 miles

Big Dogs Huge Paws, Inc

PO Box 460699, Aurora, CO 80046

Pet Types: dogs

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Rescue

35.9 miles

Big Bones Canine Rescue

Windsor, CO 80550

Pet Types: dogs

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Rescue

37 miles

All Aboard Animal Rescue

Fort Collins, CO 80526

Pet Types: cats, dogs

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Rescue

43.6 miles

Until They're Home

Fort Collins, CO 80524

Pet Types: cats, dogs, rabbits, small animals

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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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