If you’ve spotted a stocky, brown animal sunning itself near a fence row or darting across a Tennessee pasture in early spring, you’ve likely crossed paths with the state’s only true marmot. Knowing when that animal wakes up — and what it does in those first days above ground — makes every outdoor outing a little more rewarding.
Tennessee’s mild climate means its marmot emerges earlier than relatives living further north, and the timing follows a reliable pattern tied to warming temperatures and the return of green vegetation. Whether you’re a casual nature watcher or simply curious about the wildlife sharing your backyard, this guide walks you through everything you need to know about marmot hibernation and emergence in the Volunteer State.
Which Marmot Species Live in Tennessee
Tennessee is home to exactly one marmot species: the groundhog, also called the woodchuck (Marmota monax). The groundhog is a rodent of the family Sciuridae, belonging to the group of large ground squirrels known as marmots. You may also hear it called a whistle pig or a chuck — all names for the same animal.
The groundhog, being a lowland animal, is exceptional among marmots. Other marmots, such as the yellow-bellied and hoary marmots, live in rocky and mountainous areas. Those western species are not found in Tennessee. The groundhog is the state’s sole representative of the marmot group, and it thrives here precisely because it prefers flat to gently rolling lowland terrain rather than alpine slopes.
Key Insight: When people in Tennessee search for “marmots,” they are almost always referring to the groundhog or woodchuck (Marmota monax). No other marmot species is native to the state.
In Tennessee, woodchucks can be found nearly everywhere — meadows, woodlots, hay fields, pastures, hedgerows, idle fields, parks, and suburbs. Their adaptability to human-altered landscapes makes them one of the more frequently encountered wild mammals across the state.
Physically, adults may measure from 41.8 to 68.5 cm in total length, including a tail of 9.5 to 18.7 cm. Weights of adult groundhogs typically fall between 2 and 6.3 kg. Their grizzled brown fur, short legs, and flattened bushy tail make them easy to identify once you know what to look for. You can also learn about other wildlife that shares Tennessee’s landscape by reading about when snakes come out in Tennessee.
When Do Marmots Hibernate in Tennessee
Tennessee groundhogs are true hibernators — not simply animals that sleep a bit more in winter. The animal is a true hibernator. The physiological changes that occur during hibernation are dramatic and worth understanding before you look at when they wake up.
When the groundhog enters hibernation, there is a drop in body temperature to as low as 35 degrees Fahrenheit (2 °C), heart rate falls to 4–10 beats per minute, and breathing rate falls to one breath every six minutes. This deep torpor is what allows them to go months without eating or drinking.
Pro Tip: Because groundhogs are such deep hibernators, you should never attempt to disturb a burrow in late fall or winter. A groundhog roused too early may not have enough fat reserves to survive until spring vegetation returns.
In Tennessee specifically, the timing of hibernation entry is shaped by the state’s relatively mild climate. Woodchucks hibernate deeply from the time of the first heavy frost through early spring. In most parts of Tennessee, the first significant frost typically arrives in October, which is when groundhogs begin retreating underground.
In most areas, groundhogs hibernate from October to March or April, but in more temperate areas, they may hibernate as little as three months. Groundhogs hibernate longer in northern latitudes than southern latitudes. Because Tennessee sits at a more southerly latitude compared to states like Pennsylvania or New York, groundhogs here tend to have a shorter hibernation window than their northern counterparts.
Before entering hibernation, groundhogs spend late summer and early fall eating intensively. In early June, woodchucks’ metabolism slows, and while their food intake decreases, their weight increases by as much as 100% as they produce fat deposits to sustain them during hibernation and late winter. By the time they seal themselves into their burrows, they are at peak body weight.
| Hibernation Stage | Typical Timing in Tennessee |
|---|---|
| Begin fattening up | Late summer (July–September) |
| Enter hibernation | Mid to late October (after first heavy frost) |
| Deep torpor period | November through January |
| Males begin stirring | Late January to mid-February |
| Full emergence (males) | Late February to early March |
| Full emergence (females) | Early to mid-March |
When Do Marmots Come Out of Hibernation in Tennessee
This is the question most Tennessee nature watchers want answered. The short version: groundhogs in Tennessee typically begin emerging in late January through March, with males appearing before females and the exact timing depending on that year’s temperatures.
Groundhogs emerge from hibernation in very early spring, as soon as ground and air temperatures start rising. In Tennessee’s warmer climate, this process can begin earlier than the famous Groundhog Day on February 2 — though full, sustained activity usually arrives a few weeks later.
Male woodchucks emerge from hibernation earlier than females in order to establish territories, dominance hierarchies, and to search for mates. You may spot the first males moving cautiously through still-dormant fields as early as late January in the warmer parts of Middle and West Tennessee, while East Tennessee’s higher elevations and cooler valleys push emergence closer to late February or early March.
Important Note: Early emergence doesn’t mean permanent activity. The legend of Groundhog Day is likely due to the fact that woodchucks often re-enter hibernation after emerging from their dens prematurely. A cold snap after an early warm spell can send them back underground temporarily.
The timing and duration of hibernation can vary depending on the climate and location. In colder areas, groundhogs might start hibernating in late October and stay in this state until March or April. In milder climates, they might hibernate for shorter periods or not at all. Tennessee’s climate falls squarely in the “milder” category, meaning you can reasonably expect to see the first groundhogs of the year well before spring officially begins.
Groundhogs don’t come out of hibernation until there is green grass worth eating. This is a useful practical rule for Tennessee observers: when you start noticing the first flush of green grass and early spring plants, groundhog activity is likely right around the corner. The return of food is one of the most reliable triggers for sustained above-ground activity.
For comparison, you can see how hibernation timelines work for other species by reading about when bears come out of hibernation in Kentucky or when bears come out of hibernation in Maryland.
What Marmots Do Immediately After Hibernation in Tennessee
The hours and days following emergence are some of the most behaviorally interesting in a groundhog’s year. Contrary to what you might expect, the first priority is not food.
As soon as groundhogs wake up, they only have one thing in mind — and it’s not eating. Groundhog mating season begins as soon as the animals wake up in springtime. Male groundhogs wake up, emerge, and immediately start looking for female burrows nearby. Spring mating season is one of the few times groundhogs will socialize.
In nature, the real Groundhog Day is a serious matter for male groundhogs, who leave their winter dens in late February to scout out females and ensure other males are not trespassing. Males may travel surprising distances across fields and woodland edges to check on nearby female burrows, then return to their own dens to rest before full spring activity begins.
Pro Tip: If you spot a groundhog moving purposefully across open ground in late February or early March in Tennessee, it is almost certainly a male on a mating reconnaissance mission — not simply foraging. Watch for this behavior near fence rows and field edges.
Once the mating drive is underway, hunger catches up quickly. Shortly after they go looking for mates, newly-awakened groundhogs remember they haven’t eaten for five months. Groundhogs tend to forage and eat more than ever in spring, especially when they’re caring for newborn babies.
In early spring, dandelion and coltsfoot are important groundhog food items. You’ll often see freshly emerged groundhogs grazing on the earliest green shoots available — clover, grass tips, and early wildflowers are all on the menu as soon as they appear.
Basking is another key post-hibernation behavior. Groundhogs spend time sunning near burrow mouths to warm up after cold nights or after spring emergence. After months at near-freezing body temperatures, warming up in the sun is both a physiological necessity and a visible sign that spring activity has truly begun.
Breeding occurs shortly after males and females have made contact. The breeding season extends from early March to mid- or late April, after hibernation. Female groundhogs give birth to two to six offspring after a gestation period of around 32 days. In Tennessee, this means pups are typically born in April or early May, tucked safely in the underground nest chamber. You can explore similar post-hibernation patterns in other states by reading about when bears come out of hibernation in Massachusetts or when bears come out of hibernation in Maine.
Where to Spot Marmots in Tennessee
Tennessee groundhogs are widespread and not particularly secretive once spring activity is underway. Knowing the right habitat and time of day dramatically improves your chances of a sighting.
Woodchucks favor meadows, woodlots, hay fields, pastures, hedgerows, and idle fields. Dens are usually found in open fields near fence rows or woodland edges, or under barns, sheds, porches, decks, stone walls, and wood piles. The classic Tennessee groundhog habitat is the edge zone between a mowed or grazed field and a wooded area — they want open ground for foraging but quick access to cover.
- Field and pasture edges — particularly where grass meets a hedgerow or tree line
- Fence rows — stone walls and wooden fences offer both den sites and observation posts
- Highway rights-of-way — the grassy margins along rural Tennessee roads are prime groundhog habitat
- Farmsteads — under outbuildings, decks, and brush piles near agricultural fields
- Suburban yards — especially those bordering undeveloped land or gardens
- State and local parks — picnic areas and open lawns with adjacent wooded cover
Woodchucks are typically daytime animals. During most of the year, their activity peaks in mid-morning and again in the late afternoon, but declines at midday. Plan your wildlife watching for the first two hours after sunrise or the two hours before sunset for the best results.
Woodchucks rarely travel more than 50 yards from their den, even to feed. This means that once you identify an active burrow, you can return to the same spot repeatedly and expect to see the resident groundhog nearby. Patience and stillness near a known burrow entrance will almost always reward you with a sighting on a warm spring morning. For those interested in other wildlife viewing opportunities in similar terrain, check out information on when snakes come out in North Carolina and when snakes come out in Ohio.
How to Tell If a Marmot Is Active in Tennessee
You don’t always need to see the animal itself to know whether a groundhog is using a burrow. Several reliable signs tell you whether a den is occupied and whether the resident is currently active above ground.
Burrow entrance appearance
A well-used main entrance typically features a large mound of dirt and stones nearby. The burrow entrance is sealed off with dirt during hibernation. In spring, a freshly opened entrance with loose, recently disturbed soil is a strong indicator that a groundhog has emerged. Secondary entrances, which are dug from the inside, generally lack this dirt mound.
Fly activity
You will often see flies around an active burrow. This is one of the more overlooked signs — flies are attracted to the scent and warmth of an occupied den, and their presence near a burrow entrance in spring is a reliable activity indicator.
Worn trails and vegetation clipping
A well-worn trail from entrance to entrance, or to the garden, is another sign of regular use. Look for flattened grass paths leading from the burrow toward nearby feeding areas. Fresh clipping of grass, clover, and dandelion stems near the burrow is also a sign of recent foraging.
Common Mistake: Confusing an old, collapsed burrow with an active one. Active burrows have clean, open entrances with loose soil. Inactive burrows are often partially caved in, overgrown with vegetation, or filled with leaf litter. Check for fresh digging or fly activity to confirm current use.
Basking behavior
Adults are often seen basking in the sun, in a grassy area, on a fence post, stone wall, large rock, or fallen log — always near the burrow. A groundhog sitting upright and motionless in a sunny spot near a mound of dirt is one of the most classic spring wildlife sightings in rural Tennessee.
Vocalizations
Woodchucks produce occasional sharp whistles and low churrs, given at times of danger. If you hear a high-pitched whistle from a field edge and then notice a brown animal diving into a hole, you’ve just witnessed a groundhog’s alarm call — one of the behaviors that earned it the nickname “whistle pig.” Explore more seasonal wildlife activity patterns by reading about when snakes come out in Pennsylvania and when bears come out of hibernation in Colorado.
Tennessee’s groundhog season is one of the quieter but genuinely rewarding wildlife cycles the state has to offer. Once you know what to look for — the first males moving through late-winter fields, the fresh mound of soil at a burrow entrance, the sound of a whistle from a fence row — you’ll start noticing these animals in places you walked past all winter without a second glance.