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Mastiff puppies and dogs in Longmont, Colorado

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

Adopt a Mastiff near you in Longmont, 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 Longmont, Colorado

These Mastiffs are available for adoption close to Longmont, Colorado.
Photo of Murphy

Murphy

Mastiff

Male, 4 mos
Mead, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, Spayed or Neutered, Shots are up-to-date,
Story
Oh my, my, Murphy! Just look at this perfect, giant, boy! Murphy is approximately 3.5-4 months old and he’s already over 40 lbs. He’s smart as whip (knows multiple commands already), plays very well with other dogs yet doesn’t incessantly bug them, does well in the car, good on leash, and the list goes on! Murph sleeps with his foster mom and he’s quiet all night – minus some snoring, of course. He’s doing quite well with his house training but firmly believes crates are for peasants and he will not tolerate being put in one. 😳. Good thing he’s the goodest boy! Murphy is in foster in Parker, 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/murphy-2 You can apply for our wonderful dogs at https://www.milehighcanine.org/adopt/adoption-application/.

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BARNEY

Mastiff

Male, 8 yrs 3 mos
Brighton, CO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Spayed or Neutered,
Story
Meet Barney, a charming, adult dog with a heart full of curiosity and sweetness. His gentle soul is evident in his loyalty and kindness. While Barney may show some reactivity towards unfamiliar faces, his love for his trusted humans is unshakable. Due to his nature, Barney would thrive best in a cat-free environment. With a personality as endearing as Barney`s, it`s hard not to fall in love. His unique blend of curiosity and loyalty makes him a delightful companion. Barney is more than just a shelter pet, he`s a friend waiting to fill your home with joy and loyalty. Adopt Barney and experience the unconditional love only a pet can give.

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Photo of Walton

Walton

Mastiff

Male, 8 yrs 7 mos
Windsor, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Spayed or Neutered,
Story
Meet Mr. Walton! This handsome 8 year old Mastiff/Boxer mix is the definition of gentle giant. At 85 pounds, he is the sweetest, cuddliest boy. Down to do whatever, as long as he's with you, Walton is the perfect companion. He loves to cuddle on the couch, nap in the sun or walk around the neighbourhood. His favorite seat is in the passenger seat with his head out the window for an evening car ride. While he would prefer to be the only dog in the house, it's not necessary. He does well with the male dogs, including puppies. He loves kids and is very gentle with everyone he meets. He is a people dog, loving and melting the hearts of everyone he meets. He LOVES treats, is house trained, leash trained and kennel trained. This senior boy is looking for his retirement home, Come meet him in Windsor!

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Photo of Zeus

Zeus

Mastiff

Male, 2 yrs 6 mos
Windsor, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Spayed or Neutered,
Story
Zeus, a 3-year-old big and handsome Mastiff mix, with a loving and goofy personality, and is looking for a forever home. He's known for his affectionate nature, enjoying cuddles, belly rubs, and being close to humans, including children. Zeus is house and crate trained, though he's still adjusting to calm leash walking. After a challenging year of transitions, he's ready for a stable environment where he can thrive. The ideal home for Zeus would include an owner experienced with large breeds, potentially working from home, to provide the love and companionship he deserves. Currently fostered in Denver, Zeus is eager to meet his new family.

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Photo of Ombre

Ombre

Mastiff Boxer

Male, Adult
Fort Collins, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
This pups adoption fee has been partially sponsored by All Aboard or an All Aboard partner! The new adoption fee is reflected on the profile. Ombre is big guy with a lot of love to give! He came to us with a few quirks that his foster has been helping him work through and he is constantly making progress! He does need an experienced adopter who will be dedicated to continued positive reinforcement training and ongoing socialization. He has come a long way since his arrival in January 2023 and needs the perfect partner in crime to help him continue making progress! Ombre can be a bit skittish with new sounds or unexpected movements and can resource guard at times. He is occasionally slow to warm up to new men and other dogs, but not consistently! He can get overwhelmed in new high-activity environments, so continued socialization is a must. Ombre is very loving and curious, and acts like he is his foster's shadow. This loving boy is a classic case of a dog who is worth the effort! With the right, experienced adopter who is committed to setting him up for success through continued training and socialization, Ombre will absolutely blossom into his adopter's most dedicated friend! He is house and kennel trained. Playgroup - https://youtube.com/shorts/Brmr_wwiRKs ADOPTION FEE: $75 We are a foster-based rescue and do not generally have pups available to meet at our office except during adoption events on Saturdays. Interested in this pup? The first step is to complete our online application by clicking the "Apply for Adoption" button. Please note that we are only able to finalize adoptions at events for approved adopters. The earlier you apply, the better as it takes time to review and approve applications. We host adoption events almost every Saturday from 10:00am to 1:00pm at our rescue office (1721 W Harmony, unit 102, Fort Collins, Co 80526)! Check our Instagram and/or Facebook page for info on where we will be hosting adoptions this weekend! All Aboard Animal Rescue saves dogs and puppies from high-kill shelters in other states. These pups are brought to Colorado, where they are required to be spayed or neutered - breaking the cycle of unwanted litters of puppies who end up as strays! Please consider supporting us in this mission by adopting, fostering, volunteering, or donating.

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Photo of Sabrina

Sabrina

Mastiff Anatolian Shepherd

Female, Adult
Boulder, CO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Not good with kids, Not good with dogs, Not good with cats, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
This sweet girl was rescued from a high-kill shelter. Sabrina is a super-sweet girl who loves naps, cuddles, and long walks. She gets along well with mellow, polite dogs. Sabrina would do best in a loving, patient home that would show her that humans can be trusted (and a good source of pets/treats!)

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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 Longmont, Colorado.

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Mastiff puppies and dogs in nearby cities

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Related breeds in Longmont, Colorado

Bullmastiffs in Longmont, Colorado Neapolitan Mastiffs in Longmont, Colorado St. Bernards in Longmont, Colorado

Mastiff shelters & rescues in Longmont, Colorado

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

Here are a few organizations closest to you:

Rescue

5.7 miles

Mile High Canine Rescue, Inc.

Mead, CO 80542

Pet Types: dogs

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Shelter

15.7 miles

Riverdale Animal Shelter

12155 Park Blvd, Brighton, CO 80601

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

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Rescue

22.4 miles

Big Bones Canine Rescue

Windsor, CO 80550

Pet Types: dogs

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Rescue

22.4 miles

Big Bones Canine Rescue

Windsor, CO 80550

Pet Types: dogs

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Rescue

27.7 miles

All Aboard Animal Rescue

Fort Collins, CO 80526

Pet Types: cats, dogs

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Rescue

29.6 miles

Ace of Hearts - CO Transport Stop

711 Walnut St, Boulder, CO 80203

Pet Types: dogs

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Rescue

31.9 miles

A Friend of Jack Rescue

Denver, CO 80223

Pet Types: dogs

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Shelter

31.9 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

33.1 miles

Until They're Home

Fort Collins, CO 80524

Pet Types: cats, dogs, rabbits, small animals

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Rescue

33.1 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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