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Mastiff puppies and dogs in Loveland, Colorado

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

Adopt a Mastiff near you in Loveland, Colorado

These Mastiffs are available in Loveland, Colorado.
We'll also keep you updated on ZEUS's adoption status with email updates.
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ZEUS

Mastiff

Male, 10 mos
Loveland, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
Hello! My name is Zeus and I am a sweet energetic pup looking for a home. I will still need some help with leash and potty training but I know basic commands like sit and stop. I can be rambunctious when meeting other dogs so I will need to meet any dogs in the home at the shelter to ensure we are a good fit! I would love to meet you!

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Or, how about these Mastiffs in cities near Loveland, Colorado

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

Mastiff

Male, 10 mos
Loveland, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
Hello! My name is Zeus and I am a sweet energetic pup looking for a home. I will still need some help with leash and potty training but I know basic commands like sit and stop. I can be rambunctious when meeting other dogs so I will need to meet any dogs in the home at the shelter to ensure we are a good fit! I would love to meet you!

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

Mastiff Boxer

Male, 4 yrs 3 mos
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. IMPORTANT NOTE REGARDING THIS DOG: Ombre can be easily startled by new people and things. He is occasionally slower to meeting new people, especially men, and other dogs. Ombre has the potential to get overwhelmed easily and can resource guard. Ombre needs an adopter who is patient and willing to continue his training. 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 11:00am to 2:00pm at Petco in Fort Collins (2211 S College Ave. STE 200, Fort Collins, CO 80525)! 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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We'll also keep you updated on Vishnu's adoption status with email updates.
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Vishnu

Mastiff

Female, 4 yrs 6 mos
Windsor, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
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Story
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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 Zeus's adoption status with email updates.
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Zeus

Mastiff

Male, Adult
Fort Collins, CO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with kids, House-trained, Spayed or Neutered,
Story
Hi, I’m Zeus, a 6-year-old Mastiff–Rottweiler mix weighing in at a totally manageable 103 lbs (even though I firmly believe I’m lap-sized). If you’re looking for world-class cuddles, look no further. I was surrendered to my foster by my family because my parents were getting divorced. Neither could find space for me in their new homes. It's been a hard transition but I'm finally coming out of my shell. I’m sweet, soft-hearted, and full of love, living up to the title of gentle giant. I adore dogs, do great with kids, and I’m totally cool with cats—no chasing, just peaceful coexistence. I’m fully potty trained, walk beautifully on a leash (no pulling here!), and I know my basics commands like sit and drop it. I am a good boy and proud of it. Even though I am 6 at heart, I’m still a big puppy. My determination to catch my own tail and joyful energy is guaranteed to make you laugh even on your worst day. Toys? Oh, I love them… but fair warning: if it squeaks, I will surgically remove the squeaker with my teeth.  A few things I’m working on: I can be shy and bark when people show up unannounced, men especially, but I’m working hard on my confidence. Public outings are helping a lot, and I’m improving every day. I don’t love being alone and would do best with someone who has time for me—or even better, another medium to large dog to keep me company. I’m a bit of a counter surfer and an occasional trash inspector. A locked trash can solves that problem completely. But my foster has yet to find a place high enough on her shelves to keep me from having a second breakfast. I'm clever but not destructive. If you’re looking for a loyal shadow, a cuddle buddy, and a companion who will love you endlessly, I might just be your guy.March 10, 2026, 3:01 pm

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

Mastiff

Female, 2 yrs 5 mos
Longmont, CO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
-
Story
This dog is recommended for a home with older children

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Mastiff puppies and dogs in nearby cities

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Related breeds in Loveland, Colorado

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

Mastiff shelters & rescues in Loveland, Colorado

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

Here are a few organizations closest to you:

Shelter

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NOCO Humane Larimer Campus

3501 E 71st Street, Loveland, CO 80538

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

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Rescue

8.2 miles

All Aboard Animal Rescue

Fort Collins, CO 80526

Pet Types: cats, dogs

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Rescue

10.6 miles

Big Bones Canine Rescue

Windsor, CO 80550

Pet Types: dogs

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Rescue

13.9 miles

Mile High Canine Rescue, Inc.

Mead, CO 80542

Pet Types: dogs

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Rescue

14.6 miles

Until They're Home

Fort Collins, CO 80524

Pet Types: cats, dogs, rabbits, small animals

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Shelter

18.1 miles

Longmont Humane Society

9595 Nelson Road, Building G, Longmont, CO 80501

Pet Types: cats, dogs, rabbits, small animals

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Rescue

48.4 miles

Ace of Hearts Dog Rescue - CO Transport Stop

711 Walnut St, Boulder, CO 80203

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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