Gopher vs Groundhog: What's the Difference?

What Southern California Homeowners Need to Know

Pocket gophers and groundhogs are two of the most commonly confused burrowing mammals in North America — but they are completely different animals. They are different species, different sizes, live in different parts of the country, and cause different types of damage. If you live in Southern California and have a burrowing pest problem, you have a gopher. Southern California does not have groundhogs.

Quick Comparison — Gopher vs Groundhog

Here is a side-by-side breakdown of the key differences:

Size: Pocket gophers are small — 5 to 9 inches long, 3 to 10 ounces. Groundhogs are large — 16 to 27 inches long, 5 to 14 pounds. A groundhog is roughly 15 times heavier than a pocket gopher. Appearance: Pocket gophers are rarely seen — they spend almost their entire life underground. Groundhogs are frequently visible above ground, sitting upright in fields and along roadsides. If you have seen the animal causing your yard damage, it is almost certainly not a pocket gopher. Geographic range: Groundhogs live in the eastern United States and Canada. They do not live in California. Pocket gophers are found throughout California including all of Southern California. Burrow signs: Pocket gophers leave fan-shaped or crescent-shaped mounds of loose dirt at the soil surface. The burrow entrance is plugged. Groundhog burrows have large, open entrances — 6 inches or more in diameter — with dirt mounded outside. Hibernation: Groundhogs are true hibernators — they go dormant for 3 to 5 months each winter. Pocket gophers do not hibernate and are active year-round, including during winter months. Diet: Both eat plant material, but pocket gophers pull plants down from below — eating roots, bulbs, and stems underground. Groundhogs forage above ground on grasses, clover, and garden vegetables.

What Is a Groundhog?

The groundhog (Marmota monax), also known as a woodchuck or whistle pig, is a large marmot — the same family as ground squirrels and prairie dogs. It is found throughout the eastern United States and Canada, from Alaska south through the Appalachians.

Key characteristics of groundhogs:

Large, stocky body — 16 to 27 inches long, typically 5 to 14 pounds

Grizzled brownish-gray fur

Short, bushy tail

Highly visible above ground — commonly seen sitting upright in open areas

Digs burrows but forages above ground on vegetation

True hibernator — goes dormant from October through February or March

Not found in California

Groundhogs are well-known in popular culture for Groundhog Day, when Punxsutawney Phil in Pennsylvania supposedly predicts spring. This tradition is entirely based on eastern wildlife — the groundhog has no presence in California or the western United States.

What Is a Pocket Gopher?

The Botta's pocket gopher (Thomomys bottae) is the species responsible for lawn and garden damage throughout Southern California. It is named for its fur-lined cheek pouches — the "pockets" — which it uses to carry food underground.

Key characteristics of pocket gophers:

Small body — 5 to 9 inches long, 3 to 10 ounces

Brown to grayish-brown fur, lighter on the underside

Large, curved front claws for digging

Small eyes and ears — adapted for underground life

Cheek pouches that extend from the mouth back to the shoulders

Almost never seen above ground

Active year-round — does not hibernate

Solitary and highly territorial — one gopher per burrow system

Found throughout California in virtually every soil type

Pocket gophers are entirely subterranean. They excavate tunnel systems that can extend 200 feet or more, feeding on roots, bulbs, and underground plant parts. The only visible evidence is the mound of loose dirt they push to the surface when excavating.

How to Tell Gopher Mounds from Groundhog Burrows

Gopher mounds are the most common sign of pocket gopher activity. They are fan-shaped or crescent-shaped piles of loose soil, typically 6 to 24 inches across. The actual burrow entrance is located on one side of the mound and is plugged with soil — you will not see an open hole. Fresh mounds appear overnight. Multiple mounds in a yard indicate an active gopher working its tunnel system. Groundhog burrows look completely different. The entrance is large and open — typically 5 to 8 inches in diameter — with a mound of excavated dirt just outside. Groundhogs often have multiple entrance holes. Because groundhogs do not live in California, if you are seeing open burrow holes in your yard, you are likely looking at ground squirrel burrows, not groundhog burrows.

What Animal Do Southern Californians Actually Have?

If you live in Southern California and are trying to identify a burrowing pest, here is a simple guide:

Fan-shaped mounds of dirt, no open holes visible: Pocket gopher. The most common burrowing pest in Southern California. Active underground, almost never seen. Open burrow holes, large brown animal seen above ground: California ground squirrel. Commonly mistaken for a groundhog by people from eastern states. Ground squirrels are brown, spotted, 14 to 20 inches long, and frequently seen sitting upright. They live in colonies. Ground squirrel control is different from gopher control. Raised surface tunnels, volcano-shaped mounds: Mole. Less common than gophers in Southern California but present in coastal areas and well-irrigated lawns. See gopher vs mole for a detailed comparison. Large open holes, stocky brown animal: Not a groundhog. California does not have groundhogs. You are almost certainly seeing a ground squirrel.

Can You Have Both Gophers and Groundhogs in California?

No. Groundhogs do not live in California. There are no established groundhog populations anywhere in the state. The natural range of the groundhog ends in the Great Plains states — they are not found in the Rocky Mountain west or Pacific coast states.

If you moved to Southern California from Pennsylvania, Ohio, New York, or another eastern state where groundhogs are common, the animal damaging your yard is a pocket gopher — a smaller, entirely different species that happens to also dig burrows.

Gopher Damage vs Groundhog Damage

Pocket gopher damage in Southern California typically includes:

Multiple fan-shaped dirt mounds appearing overnight

Plants wilting or dying as gophers eat their roots from below

Drip irrigation lines chewed through underground

Ornamental plants, vegetables, and lawn grass all affected

Damage occurs across the yard as the gopher expands its tunnel system

Groundhog damage — which you will not see in Southern California — typically includes above-ground grazing on garden vegetables, damage to foundation plantings, and structural undermining from large burrow systems near buildings.

How to Get Rid of Gophers in Southern California

Since Southern California has gophers and not groundhogs, gopher control methods are what you need. Professional trapping is the most effective and reliable method.

Rodent Guys uses chemical-free trapping and carbon monoxide treatment — no poison bait, no rodenticide. Our methods are safe for dogs, cats, and other pets. All gopher control service includes a 60-day guarantee — if gopher activity returns during the guarantee period, we return at no charge.

Call 909-599-4711 for same-week gopher service throughout Southern California, or request a free quote online.

Related Resources

Gopher Animal · Gopher Rat · Gopher Types · Gopher Vs Ground Squirrel · Gopher Vs Prairie Dog · Ground Squirrel · Mole Or Gopher Mound · Mole Vs Vole