If you plan to hike, camp, or explore areas where rattlesnakes may live, knowing how to identify their dens can help you avoid potential danger. Rattlesnake bites are painful and can be life-threatening if not treated quickly, so spotting a den before getting too close is wise.
If you’re short on time, here’s a quick answer to your question: Look for sheltered, rocky areas facing south or west, like crevices in boulders or holes in sandy cliffs. Watch for signs like shed rattlesnake skins, tracks, or bleached bones around an opening.
Avoid reaching into dark holes and under rocks where snakes may hide.
Where to Look for Rattlesnake Dens
Rocky Outcrops and Ledges
Rocky outcrops and ledges provide excellent shelter for rattlesnakes to establish dens. Crevices between boulders allow snakes to burrow below the frost line and create spaces protected from the elements. South-facing rocky slopes that absorb heat from sunlight are especially attractive spots.
Check areas with lots of fractured rocks, deep fissures, or under overhanging ledges. Focus your search efforts near rodent burrows, as rattlesnakes remain close to their food supply.
Talus slopes or rock slides can house dozens of individual snakes. An astonishing 140 rattlesnakes were documented using one den site in Idaho! When searching these areas, take care not to place your hands or feet where you can’t see clearly.
Use trekking poles or sticks to tap around unstable rocks before moving them.
Rodent Burrows
Rattlesnakes frequently inhabit abandoned rodent burrows, including those made by ground squirrels, prairie dogs, chipmunks, and marmots. Start looking around south-facing slopes where rodents establish dense tunnel complexes.
Notice areas with many small holes in the ground – a telltale sign of active burrowing. Stacked piles of excavated dirt outside burrows indicate recent occupation.
Be cautious when examining possible den holes. First, toss a small pebble into the entrance and listen for a warning rattle. This alerts any resident snake of your presence. Approach slowly while scanning the ground thoroughly before putting your hands near a burrow.
Use a flashlight to peer inside entrances first. Many holes twist and turn within the tunnels, so your view will be limited. Remain observant of all surrounding holes – more than one may be occupied.
Under Brush and Trees
The roots of shrubs, small trees, and woody debris provide cover for rattlesnakes. Crawl spaces underneath vegetation offer shelter from weather and cold temperatures. Search areas with lots of logs, heavy brush, rock cairns, or rodent burrows.
The presence of prey animals again provides clues where to begin looking.
Use a trekking pole to flip logs or carefully move branches when investigating possible hiding spots. Never place your hands directly under an object you cannot see below clearly. Wear sturdy boots and long pants to protect your feet and legs.
Brush piles in particular present biting hazards – rattle around thoroughly with a stick before reaching inside to part vegetation.
What to Look for When Identifying Dens
Shed Skins
One of the clearest signs that rattlesnakes are living in an area is the presence of shed skins. As snakes grow, they shed their outer layer of skin periodically. The shed skin will be lying intact on the ground, looking almost like the snake itself.
Shed skins can be identified as belonging to a rattlesnake by their pattern and the presence of the rattle segment on the end (though the rattle may have broken off). Finding shed skins means rattlesnakes have been in the area recently.
Tracks
Rattlesnake tracks are another indicator to look out for when trying to locate dens. Their tracks are distinctive – showing just the belly scales in a winding pattern. The tracks may be seen in fine dust or sandy areas near rock crevices or burrows.
Rattlesnakes don’t have claws, so their tracks will not show claw marks like some other snakes. Following these tracks can sometimes lead you right to a den, but be cautious when doing so.
Bleached Bones
An accumulation of bleached bones around or near a crevice is a clear sign that a snake den is nearby. Rattlesnakes will prey on small mammals like mice, rats, squirrels, rabbits and other animals. After eating their prey, they will leave the bones near their home.
Look for an abundance of small animal skulls and bones that have been bleached in the sun. This often indicates that snakes have been using the area for feeding for quite some time.
When Rattlesnakes Are Most Active
Spring
Rattlesnakes emerge from brumation in the spring as temperatures begin to warm up, typically in late March or April depending on location. This is when they become highly active as they search for food and mates after months of inactivity over the winter.
The spring is mating season for rattlesnakes, so males will engage in “combat dances” competing for receptive females. Females also begin gestating young that will be born later in the summer.
In the spring, rattlesnakes are often seen basking in the first warm rays of sunlight after winter. Their cold-blooded metabolism relies on ambient heat sources to become active. Areas that receive direct sun exposure, like rock outcroppings, south-facing slopes, and prairie dog towns, are prime spots to find basking rattlesnakes in the spring. According to wildlife experts, the majority of rattlesnake bites occur in the spring months when humans and snakes cross paths more frequently with increased outdoor activity.
Summer
The summer is when rattlesnakes are most active as they hunt prey to support their accelerated metabolism and to produce milk for their newborn young. Under summer’s hot temperatures, rattlesnakes become nocturnal to avoid overheating and will move around mostly at night instead of the daytime.
Pregnant female rattlesnakes give birth to live young in summer litters typically in July or August. Baby rattlesnakes are independent from birth. While small in size, newborn rattlesnakes are equipped with fully functioning venom and rattles from the moment they are born. The rattle serves as a warning signal to alert threats of the snake’s toxic defense system.
Fall
As days become shorter and temperatures cool down heading into autumn, rattlesnakes start hunting less and conserve energy in preparation for brumation. By late September or October, they will retreat underground to communal dens with other rattlesnakes where they remain inactive for the winter months until spring emerges again.
An interesting behavioral change happens in the fall – rattlesnakes that generally lead solitary lives will congregate in large numbers at communal dens where dozens or even hundreds of snakes gather to overwinter together. These dens are often used year after year and some have hosted generations of rattlesnakes for centuries!
How to Safely Avoid Rattlesnake Dens
Wear Proper Footwear and Clothing
When hiking in rattlesnake territory, wear closed-toe shoes or hiking boots that cover your ankles to protect your feet and lower legs. Avoid sandals and flip-flops which leave you vulnerable to snake bites. Opt for long pants made of a sturdy material like denim or canvas – avoid shorts.
Tuck pants into boots or socks for extra protection. Wearing layers can help cushion venomous bites, so wear long sleeves if possible.
Use Trekking Poles
Trekking poles are great tools for hiking in rattlesnake areas. As you walk, gently tap the ground ahead with poles to alert snakes to your presence, prompting them to rattle or slither away. This gives snakes a chance to retreat before you encounter them, avoiding surprise encounters that are more likely to end badly. Poles also provide stability on rough terrain, keeping you upright and less likely to stumble onto hidden snakes.
Watch Your Step
Be careful where you place your feet and hands when climbing over logs or rocks. Scan the area first and prod gently with trekking poles or sticks to check for snakes before stepping over or sitting on rocks and logs.
Rattlesnakes often blend into their surroundings extremely well, so maintaining vigilance is key. Also be careful around tall grass, brush and wood piles where snakes may lurk unseen.
Keep Dogs on Leashes
Dogs are inquisitive explorers and often stick their noses where you don’t want them – like rattlesnake dens! Keep dogs on short leashes in snake territory and don’t allow them to run ahead off-trail. Be particularly cautious near woodpiles, brush and tall grass.
Pay attention to your dog’s body language – if they freeze staring at one spot, they may have spotted a snake you haven’t. If bitten, carry dogs out safely and get veterinary care immediately.
Conclusion
By learning where rattlesnakes tend to nest and what signs to look for, you can enjoy the outdoors safely and minimize the chances of being bitten. Remember to give snakes their space, never reach into hidden areas, and steer clear of dens particularly in spring and fall when snakes are more active.
With proper precautions, you can admire these native reptiles from a safe distance.
