How long does a Golden Retriever Mastiff Mix live?

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

Is a Golden Retriever Mastiff Mix easy to train?

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

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Golden Retriever Mastiff Mix

A Golden Retriever Mastiff mix is a cross between a Golden Retriever and a Mastiff. Most grow into giant dogs of 90–150 lb and live 8–11 years.

Golden Retriever, a purebred dog — Golden RetrieverPhoto: Janneke Vreugdenhil, derivative work by Anka Friedrich, Public domain, 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.

Weight90–150 lbcan be 55–230 lb

Height24–27 inat the shoulder

Lifespan8–11 years

SizeGiant

How big does a Golden Retriever Mastiff Mix get?

Golden Retriever55–75 lb

The mix90–150 lb

Mastiff120–230 lb

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

Height runs 24–27 inches at the shoulder, against 21.5–24 in for the Golden Retriever 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 to very high

The Golden Retriever rates very high 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 Golden Retriever is usually described as friendly, intelligent, devoted. 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.

Golden Retriever vs Mastiff vs the mix

Trait	Golden Retriever	Golden Retriever Mastiff Mix	Mastiff
Weight	55–75 lb	90–150 lb	120–230 lb
Height	21.5–24 in	24–27 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	Sporting	mixed	Working

Questions about the Golden Retriever Mastiff Mix

How big does a Golden Retriever Mastiff Mix get?: Most grow to 90–150 pounds and 24–27 inches at the shoulder. Because puppies can take after either parent, the full possible range is 55–230 pounds.
How long does a Golden Retriever Mastiff Mix live?: A typical lifespan is 8–11 years, the midpoint of the Golden Retriever (10–12 years) and the Mastiff (6–10 years).
Does a Golden Retriever 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 Golden Retriever Mastiff Mix easy to train?: Trainability is moderate to very high, based on how both parent breeds respond to training. Start early and keep sessions short.

Other Golden Retriever mixes

Other Mastiff mixes

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