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Yes—snakes occur throughout Appalachian Trail (A.T.) regions, especially in warm weather. The Appalachian Trail Conservancy (ATC) identifies copperheads and rattlesnakes as the two venomous snake groups hikers may encounter. The 12 species below are regional examples documented by the National Park Service (NPS), chiefly from Great Smoky Mountains National Park, which the A.T. crosses; they are not a definitive inventory for all 2,000-plus miles of trail.
Most snakes avoid people. Give any snake room, watch where you place your hands and feet, and never handle one for a closer look. A suspected venomous bite requires an emergency call and prompt medical care.
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How to interpret this list
The NPS Great Smoky Mountains page lists 23 snake species for that park (2025). Because the Appalachian Trail passes through the Smokies, the list is a useful source for Appalachian trail-country examples, but it does not prove that every species occurs along every state or trail segment. Shenandoah National Park separately reports 16 nonvenomous species and two venomous species (2023), while New River Gorge National Park and Preserve provides identification and safety notes for copperheads and timber rattlesnakes.
Common and scientific names can differ among field guides and taxonomic treatments. The names here follow the cited Smokies NPS list. On that page, only northern copperhead and timber rattlesnake are explicitly labeled “venomous”; the other ten entries are not given a venomous label there.
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12 snakes documented in Appalachian Trail areas
| Snake | Scientific name | Status on the cited NPS list | Geographic context |
|---|---|---|---|
| Eastern worm snake | Carphophis amoenus | Not labeled venomous | Listed for Great Smoky Mountains National Park |
| Northern scarlet snake | Cemophora coccinea copei | Not labeled venomous | Listed for Great Smoky Mountains National Park |
| Northern black racer | Coluber constrictor | Not labeled venomous | Listed for Great Smoky Mountains National Park |
| Northern ring-neck snake | Diadophis punctatus edwardsii | Not labeled venomous | Listed for Great Smoky Mountains National Park |
| Corn snake | Elaphe guttata | Not labeled venomous | Listed for Great Smoky Mountains National Park |
| Black rat snake | Elaphe obsoleta | Not labeled venomous | Listed for Great Smoky Mountains National Park |
| Eastern hognose snake | Heterodon platirhinos | Not labeled venomous | Listed for Great Smoky Mountains National Park |
| Eastern kingsnake | Lampropeltis getula | Not labeled venomous | Listed for Great Smoky Mountains National Park |
| Eastern milk snake | Lampropeltis triangulum | Not labeled venomous | Listed for Great Smoky Mountains National Park |
| Northern water snake | Nerodia sipedon | Not labeled venomous | Listed for Great Smoky Mountains National Park |
| Northern copperhead | Agkistrodon contortrix | Venomous | Named by NPS for the Smokies, Shenandoah and New River Gorge regions |
| Timber rattlesnake | Crotalus horridus | Venomous | Named by NPS for the Smokies, Shenandoah and New River Gorge regions |
Eastern worm snake
The eastern worm snake is one of the Smokies examples. The NPS list does not attach a venomous label to it. Because small snakes can be difficult to identify without close examination, treat an unfamiliar individual as wildlife to avoid rather than an identification challenge.
Northern scarlet snake
The northern scarlet snake (Cemophora coccinea copei) appears on the Smokies list without a venomous designation. Color patterns can be confusing in the field, particularly in poor light, so do not approach or pick up a brightly marked snake.
Northern black racer
The northern black racer (Coluber constrictor) is another Smokies-listed species not labeled venomous on that page. A fast-moving snake may cross a path and disappear quickly; stop, let it move away, and continue only when the trail is clear.
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Northern ring-neck snake
The northern ring-neck snake (Diadophis punctatus edwardsii) is included in the park’s 23-species inventory. The listing itself does not provide a trail-wide distribution or an individual behavior profile, so it should be understood as a regional record rather than a promise of sightings on every section of the A.T.
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Corn snake
The corn snake (Elaphe guttata) is listed for Great Smoky Mountains National Park and is not marked venomous on the cited page. Seeing a patterned snake is not a reason to close the distance for a photograph; use a zoom lens from the trail instead.
Black rat snake
The black rat snake (Elaphe obsoleta) is a Smokies example without a venomous label in the NPS inventory. As with every species here, the safest response is to leave it undisturbed and keep your hands out of concealed spaces.
Eastern hognose snake
The eastern hognose snake (Heterodon platirhinos) appears in the same list without a venomous designation. Defensive displays can make a snake seem more threatening, but provoking it to produce a behavior is unsafe and disturbs the animal.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallEastern kingsnake
The eastern kingsnake (Lampropeltis getula) is documented in the Smokies list and is not labeled venomous there. The entry is evidence for occurrence in that park, not a corridor-wide range map for the entire Appalachian Trail.
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Eastern milk snake
The eastern milk snake (Lampropeltis triangulum) is another Smokies-listed species without a venomous label. If you cannot identify a snake from a safe distance, identification can wait; the animal does not need to be handled.
Northern water snake
The northern water snake (Nerodia sipedon) is included in the Great Smoky Mountains inventory and is not marked venomous on that page. Near streams or wet ground, scan the route ahead and avoid reaching beneath banks, rocks or vegetation where a snake could be resting.
Northern copperhead
The northern copperhead (Agkistrodon contortrix) is explicitly labeled venomous by the Smokies NPS page. New River Gorge NPS describes hourglass- or “saddlebag”-shaped markings. That description can help explain why hikers recognize the species in educational material, but it is not a safe-distance test and should never justify approaching one.
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The timber rattlesnake (Crotalus horridus) is explicitly labeled venomous by the Smokies NPS page. New River Gorge NPS notes a tail rattle and chevron markings. A rattle may be quiet, obscured or unnoticed, so do not assume a snake is harmless because you hear no warning.
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Where and when hikers are most likely to notice snakes
ATC says numerous snakes inhabit the A.T. corridor and may be present in warm weather. Shenandoah NPS cautions that snakes may bask on rocks or lie in the middle of a trail. It also recommends care when walking through dead leaves or turning over logs—places where a resting animal can be hidden from view.
In very hot weather, ATC notes that snakes can be active at night. Carry a flashlight or headlamp after dusk and wear shoes rather than walking in sandals or barefoot. Direct the beam several steps ahead, especially at switchbacks, rock ledges and leaf-covered sections.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to do when you see a snake
- Stop at a safe distance. Do not step toward the snake to identify it, photograph it or force it off the trail.
- Give it a wide berth. Shenandoah NPS advises leaving snakes alone. If the animal is across the path, wait for it to move or take a broad, safe detour only where the park’s rules allow.
- Keep hands out of hiding places. Look before placing a hand on a rock, log, ledge or vegetation. Never reach into a crevice you cannot see into.
- Let other hikers know calmly. A quiet warning helps people behind you avoid startling the animal; do not crowd around it.
- Move on once the route is clear. Do not follow the snake or try to make it display, rattle or retreat.
Snakes are protected wildlife in some park units. Great Smoky Mountains National Park prohibits capturing, handling or disturbing reptiles. New River Gorge NPS likewise says snakes are protected and advises hikers to avoid rather than provoke or pick one up. ATC summarizes the ecological reason plainly: “Snakes are an important part of a healthy ecosystem – please don’t kill them!”
Venomous versus poisonous: the distinction hikers need
Visitors often ask, “Is it poisonous?” The Smokies NPS explains that poisonous generally describes something harmful when eaten or touched, while venomous describes an animal that injects venom through a bite. For Appalachian Trail safety, “venomous” is the relevant term for copperheads and rattlesnakes. Do not rely on a simplified color rule, a guessed species, or the presence or absence of a rattle to decide whether to approach.
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What to do after a suspected venomous bite
Treat a suspected bite as an emergency even if pain or swelling seems limited at first. ATC’s guidance is:
- Stay as calm and still as possible and move away from the snake without attempting to catch it.
- Call 911 or have a companion call, giving your location, trail name, park and nearest access point.
- Obtain medical treatment promptly. Do not wait to see whether symptoms worsen and do not drive yourself if help is available.
- Wash the wound with soap and water if you can do so without delaying emergency care.
- Remove rings, watches and other tight jewelry before swelling develops.
- Do not apply ice or a tourniquet. Do not cut the wound or try to suck out venom.
Do not handle or kill the snake to bring it for identification. A photograph taken from a safe distance may help responders, but medical evaluation does not depend on a field-captured specimen.
Planning a safer snake encounter before your hike
- Check the managing agency’s current alerts and emergency procedures for your trail section.
- Carry a charged phone, backup power and a flashlight or headlamp, even on a day hike.
- Wear closed shoes and use trekking poles to probe the ground visually—not to poke wildlife.
- Keep dogs on leash where required and prevent them from investigating brush, logs or rocks.
- Teach children to stop, step back and call an adult rather than touching a snake.
- Note your location as you hike so you can describe it accurately to 911 if needed.
What this list can—and cannot—tell you
The 12 names provide a practical regional starting point drawn from a park the A.T. traverses. They do not establish that all 12 occur in every state, that they are equally common, or that the Smokies’ total of 23 species applies to the entire trail. A genuinely trail-wide distribution checklist would require records for each state and trail segment.
For hikers, the useful conclusion is simpler: expect that a snake may be present in warm weather, keep your eyes and hands out of concealed spaces, and give every snake room. Only two venomous groups are highlighted by ATC for the A.T.—copperheads and rattlesnakes—and both should be left completely alone.
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