How long does a Great Pyrenees Mastiff Mix live?

A typical lifespan is 8–11 years, the midpoint of the Great Pyrenees (10–12 years) and the Mastiff (6–10 years).

Is a Great Pyrenees Mastiff Mix easy to train?

Trainability is moderate, based on how both parent breeds respond to training. Start early and keep sessions short.

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Great Pyrenees Mastiff Mix

A Great Pyrenees Mastiff mix is a cross between a Great Pyrenees and a Mastiff. Most grow into giant dogs of 100–165 lb and live 8–11 years.

Great Pyrenees, a purebred dog — Great PyreneesPhoto: Wikimedia Commons contributor, CC BY-SA 3.0, source

Mastiff, a purebred dog — MastiffPhoto: Pleple2000, CC BY-SA 3.0, source

Photos show the purebred parents. There is no single look for a mix: puppies in one litter can resemble either side.

Weight100–165 lbcan be 85–230 lb

Height26–31 inat the shoulder

Lifespan8–11 years

SizeGiant

How big does a Great Pyrenees Mastiff Mix get?

Great Pyrenees85–100 lb

The mix100–165 lb

Mastiff120–230 lb

Pounds. The dark band is where most Great Pyrenees Mastiff Mix dogs end up; the light band is the full range between the smallest and largest parent.

Height runs 26–31 inches at the shoulder, against 25–32 in for the Great Pyrenees and 27.5–30 in for the Mastiff.

Coat, energy and training

Shedding

Moderate

Neither parent has a low-shedding coat, so expect dog hair around the house and seasonal heavy shedding.

Energy

Moderate to very high

Plan on long daily walks plus real exercise, such as running, fetch or a sport. A yard alone will not tire this dog out.

Trainability

Moderate

The Great Pyrenees rates low and the Mastiff moderate; a puppy may lean either way.

Grooming

Low

A weekly brush and the odd bath keep the coat in shape.

Temperament

The Great Pyrenees is usually described as smart, patient, calm. The Mastiff as courageous, dignified, good-natured. A mix can take after either parent or land in between. If you can, meet both parents of a puppy before you choose.

Great Pyrenees vs Mastiff vs the mix

Trait	Great Pyrenees	Great Pyrenees Mastiff Mix	Mastiff
Weight	85–100 lb	100–165 lb	120–230 lb
Height	25–32 in	26–31 in	27.5–30 in
Lifespan	10–12 yr	8–11 yr	6–10 yr
Shedding	moderate	moderate	low
Energy	very high	moderate to very high	moderate
Group	Working	mixed	Working

Questions about the Great Pyrenees Mastiff Mix

How big does a Great Pyrenees Mastiff Mix get?: Most grow to 100–165 pounds and 26–31 inches at the shoulder. Because puppies can take after either parent, the full possible range is 85–230 pounds.
How long does a Great Pyrenees Mastiff Mix live?: A typical lifespan is 8–11 years, the midpoint of the Great Pyrenees (10–12 years) and the Mastiff (6–10 years).
Does a Great Pyrenees Mastiff Mix shed?: Shedding is moderate. Neither parent has a low-shedding coat, so expect dog hair around the house and seasonal heavy shedding.
Is a Great Pyrenees Mastiff Mix easy to train?: Trainability is moderate, based on how both parent breeds respond to training. Start early and keep sessions short.

Other Great Pyrenees mixes

Other Mastiff mixes

Figures are calculated from each parent breed's standard height, weight and life expectancy. How we calculate.