Are There Rattlesnakes in Montana?
Yes, rattlesnakes live in Montana. Western diamondback and prairie rattlesnakes are found in southwestern and central parts of the state. People who hike or camp outdoors should be aware of them. Bites are uncommon because snakes are shy and avoid people. Deaths are very rare with prompt medical treatment. Knowledge of recognition and safety ensures safe outdoor recreation.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Eastern Diamondback Rattlesnake · Scott Allen Davis CC BY
Panamint Rattlesnake · Matt Berger CC BY
Red Diamond Rattlesnake · Amy Huie CC BY
- 2
- species recorded
- 960
- GBIF records
- June, July, May
- peak months
Yes, rattlesnakes are in Montana. Next you'll want:
Real sighting data, source iNaturalist
450 verified observations on iNaturalist of rattlesnake have been recorded in Montana, most often in June, July, May.
When rattlesnake are recorded in Montana
Yes, rattlesnakes live in Montana. Western diamondback and prairie rattlesnakes are found in southwestern and central parts of the state. People who hike or camp outdoors should be aware of them. Bites are uncommon because snakes are shy and avoid people. Deaths are very rare with prompt medical treatment. Knowledge of recognition and safety ensures safe outdoor recreation.
Are they in Montana?
Yes, rattlesnakes do live in Montana. Two species are found in the state: western diamondback rattlesnakes and prairie rattlesnakes. Western diamondback rattlesnakes are found in the southwestern portion of Montana, particularly in areas with rocky terrain and desert habitat. Prairie rattlesnakes are found in the central and eastern portions of Montana, particularly in grasslands and plains. These snakes prefer natural, undisturbed habitats and are not found in urban areas or developed residential neighborhoods. People who spend time outdoors in natural areas, hiking trails, grasslands, and forests in central and southwestern Montana should be aware that rattlesnakes may be present. To learn more aboutrattlesnake in Montana, knowing the distribution helps you take appropriate precautions. Most Montana residents never encounter a rattlesnake because these snakes are shy and actively avoid humans. They are most likely to be found in remote grasslands, rocky areas, and forests far from human development. The state's vast natural landscape contains far more area unsuitable for rattlesnakes than suitable habitat.
How dangerous are they?
Rattlesnakes found in Montana are venomous and their bites are medically serious, requiring prompt professional medical treatment. However, bites are uncommon because Montana's rattlesnakes are shy and avoid people who respect their space. Most bites occur when someone attempts to handle, capture, or kill a snake rather than from accidental encounters. A rattlesnake bite causes pain, swelling, and tissue damage at the bite site. The venom is hemotoxic, affecting tissue around the bite. Antivenom is effective and is available at Montana hospitals in areas where rattlesnakes are common. Deaths from rattlesnake bites are very rare in the United States with modern emergency medical care. Recovery is the typical outcome in healthy individuals who receive prompt medical treatment. The key to safety is recognizing the distinctive rattle and backing away to give the snake space to escape. Western diamondback and prairie rattlesnakes in Montana pose minimal risk to people who leave them alone and avoid handling them. Fear of rattlesnakes should not prevent outdoor recreation in Montana, but respect for these snakes and knowledge of appropriate responses are important.
How to recognize one
Rattlesnakes in Montana have a distinctive segmented rattle at the tip of the tail that makes a buzzing or vibrating sound when threatened. This rattle is the most reliable identifying feature and is unique among Montana snakes. Western diamondback rattlesnakes typically have tan, brown, or olive coloring with dark diamond-shaped patterns running down the back. They are often 30 to 60 inches long, with larger specimens exceeding six feet. Prairie rattlesnakes are typically smaller, usually 15 to 45 inches long, with lighter coloring and blotches or bands. Both species have thick, muscular bodies compared to non-venomous snakes. The head is roughly triangular in shape. For detailed species identification, visit ourwildlife in Montanaguides. Heat-sensing pits along the jaw help them detect warm-blooded prey. The segmented rattle at the tail distinguishes rattlesnakes from all other Montana snakes. If you see a snake with a rattle at the tail or hear a rattling sound, back away immediately and give the snake plenty of space. The rattle is a warning signal, not a threat of imminent attack.
What to do if you encounter one
If you encounter a rattlesnake in Montana, remain calm and back away slowly, giving the snake space to escape. Do not attempt to touch, provoke, or capture the snake. The distinctive rattle is a clear warning that the snake wants you to leave it alone. Rattlesnakes in Montana are not aggressive toward humans and will flee if given the opportunity. If you are bitten, keep the bitten area still and remove any rings or tight clothing. Wash the wound with soap and water and seek immediate medical attention. Call 911 or go to the nearest hospital. This is general information, not medical advice; if you are bitten, call Poison Control at 1-800-222-1222, or 911 if symptoms are severe. Poison Control can provide guidance based on your symptoms. Antivenom is available and effective at Montana hospitals. Do not attempt field treatment such as cutting, sucking, or applying ice or tourniquets. Modern emergency medicine provides the best outcome for treating a rattlesnake bite. Immediate professional medical care is essential for the best result.
How to prevent encounters
Preventing rattlesnake encounters in Montana involves awareness and sensible outdoor practices. When hiking, camping, or working outdoors in natural areas where rattlesnakes may be present, wear closed-toe boots with thick soles and watch where you step and place your hands. Stay on established trails and avoid deliberately disturbing brush piles, rock crevices, or areas you cannot see clearly. Make noise while hiking, such as talking or using a bell, which alerts snakes to your presence and allows them to move away. Avoid hiking in tall grass or brush during warm months when snakes are most active, or move slowly and carefully if you must. Before sitting on rocks or the ground, check the area to ensure no snake is present. Do not reach into areas you cannot see. When hiking in central and southwestern Montana where rattlesnakes are known to occur, staying alert and watching the ground is prudent. Wearing long pants provides some protection to the legs. These practices support generalwildlifesafety in Montana and help ensure enjoyable outdoor recreation while respecting the state's wildlife.
Where in Montana and when
Western diamondback rattlesnakes in Montana are found in the southwestern portion of the state, particularly in areas with rocky terrain and desert habitat such as parts of the Missouri River breaks region. Prairie rattlesnakes are found in the central plains and grassland regions of Montana, particularly east of the Rocky Mountains. For more information aboutwildlife in Montanaand their habitats, regional guides offer detailed coverage. Both species are found in natural areas away from human development. Rattlesnakes in Montana are active during warm months, typically from May through September, depending on temperature patterns. They emerge from winter hibernation in spring as temperatures warm and return to dens in fall to prepare for winter dormancy. During active season, they are most active during warm days and are more likely to be encountered during summer months. Cooler days in spring and fall see less snake activity. Winter is not an active season for rattlesnakes in Montana. The higher elevations of Montana are too cold for rattlesnakes, and they are not found in alpine or subalpine regions. Northwestern Montana and heavily developed areas have few or no rattlesnakes. The specific distribution depends on habitat type and elevation.
Harmless snakes that might be confused
Montana is home to several harmless snake species that might concern someone unfamiliar with snakes or worried about rattlesnakes. The garter snake is slender and common throughout Montana in various habitats. Garter snakes are completely harmless. The water snake is found near water bodies and is sometimes mistaken for a venomous snake due to its coloring. Water snakes are entirely harmless. The bull snake is large and stout with blotchy patterns and is sometimes mistaken for a rattlesnake by people unfamiliar with snakes. Bull snakes are completely harmless and are actually beneficial for controlling rodents. The racer is a slender, fast-moving snake that is harmless. The hognose snake sometimes vibrates its tail when threatened, creating a sound that might be mistaken for a rattle, but hognose snakes lack the actual segmented rattle structure and are harmless. None of Montana's non-venomous snakes produce a true rattle sound. If you encounter any snake in Montana, backing away slowly is the safest approach. Montana's harmless snakes are beneficial for controlling rodent and insect populations.
Frequently Asked Questions
Q: How common are rattlesnake bites in Montana? A: Rattlesnake bites in Montana are uncommon, and deaths are extremely rare. Most bites result from attempting to handle or kill a snake rather than from accidental encounters. Leaving snakes alone reduces the minimal risk of being bitten. Q: What should I do if I encounter a rattlesnake while hiking in Montana? A: Back away slowly and give the snake plenty of space to escape. Do not attempt to capture or handle it. The rattle is a warning for you to leave the area. Allow the snake to move away on its own. Q: Are all Montana snakes venomous? A: No, only the two rattlesnake species in Montana are venomous. The vast majority of Montana snakes are harmless and beneficial. Most Montanans never encounter a rattlesnake despite living in a state where they occur. Q: Where can I learn more about snakes andMontana wildlife? A: Contact Montana Fish, Wildlife and Parks for field guides and educational resources about local snakes and reptiles. Natural history museums throughout Montana also provide excellent information about the state's wildlife.
Plan your trip
Best time to see rattlesnake in Montana: June, July, May
See the month-by-month sighting calendar.
Plan your rattlesnake sighting in Montana
960 verified rattlesnake records have been logged in Montana. See the GBIF records.
Where to look in Montana
- Big Hole National Battlefield · Wildlife Watching, Birdwatching · Find hotels
- Bighorn Canyon National Recreation Area · Wildlife Watching, Birdwatching · Find hotels
- Grant-Kohrs Ranch National Historic Site · Wildlife Watching, Birdwatching · Find hotels
- Lewis & Clark National Historic Trail · Wildlife Watching · Find hotels
- Nez Perce National Historical Park · Wildlife Watching, Birdwatching · Find hotels
- Yellowstone National Park · Wildlife Watching, Birdwatching · Find hotels
Frequently asked questions
Are they in Montana?+
Yes, rattlesnakes do live in Montana. Two species are found in the state: western diamondback rattlesnakes and prairie rattlesnakes. Western diamondback rattlesnakes are found in the southwestern portion of Montana, particularly in areas with rocky terrain and desert habitat. Prairie rattlesnakes are found in the central and eastern portions of Montana, particularly in grasslands and plains. These snakes prefer natural, undisturbed habitats and are not found in urban areas or developed residential neighborhoods. People who spend time outdoors in natural areas, hiking trails, grasslands, and forests in central and southwestern Montana should be aware that rattlesnakes may be present. To learn more aboutrattlesnake in Montana, knowing the distribution helps you take appropriate precautions. Most Montana residents never encounter a rattlesnake because these snakes are shy and actively avoid humans. They are most likely to be found in remote grasslands, rocky areas, and forests far from human development. The state's vast natural landscape contains far more area unsuitable for rattlesnakes than suitable habitat.
How dangerous are they?+
Rattlesnakes found in Montana are venomous and their bites are medically serious, requiring prompt professional medical treatment. However, bites are uncommon because Montana's rattlesnakes are shy and avoid people who respect their space. Most bites occur when someone attempts to handle, capture, or kill a snake rather than from accidental encounters. A rattlesnake bite causes pain, swelling, and tissue damage at the bite site. The venom is hemotoxic, affecting tissue around the bite. Antivenom is effective and is available at Montana hospitals in areas where rattlesnakes are common. Deaths from rattlesnake bites are very rare in the United States with modern emergency medical care. Recovery is the typical outcome in healthy individuals who receive prompt medical treatment. The key to safety is recognizing the distinctive rattle and backing away to give the snake space to escape. Western diamondback and prairie rattlesnakes in Montana pose minimal risk to people who leave them alone and avoid handling them. Fear of rattlesnakes should not prevent outdoor recreation in Montana, but respect for these snakes and knowledge of appropriate responses are important.
More wildlife in Montana