Some of these will seem obvious. But park rangers will tell you they watch well-meaning visitors break every single one of these every day.
Most people who visit national parks are respectful, careful, and love the outdoors. That makes it even more important to know where the lines are, because the consequences are real.
Violations in national parks fall under Title 36 of the Code of Federal Regulations (36 CFR), which means they are federal offenses, not just park rules. Fines can reach into the hundreds or even thousands of dollars depending on the violation, and in some cases criminal citations are possible.
Here are 10 things visitors do constantly without realizing they are breaking federal law.
1. Picking Up Rocks, Shells, Pinecones, or Any Natural Object
This one surprises people more than almost anything else on this list. That pretty rock you found by the trail? That pinecone your grandchild wanted to take home? Removing any natural object from a national park is prohibited under 36 CFR 2.1, which covers the disturbance or removal of natural features including rocks, minerals, plants, and even fallen wood.
The logic behind the rule makes sense once you think about it. If every one of the more than 300 million annual national park visitors took home a single rock, entire landscapes would disappear over time. Enforcement does happen, and rangers have cited visitors for something as small as a handful of stones.
Leave everything exactly where you found it.
2. Feeding Any Wildlife, Including Squirrels and Birds
Most people know you are not supposed to feed bears, for obvious reasons. Fewer people realize the rule applies to every animal in the park, including the chipmunks and birds that seem almost tame from years of human interaction.
Feeding wildlife is prohibited under 36 CFR 2.2, and rangers actively enforce it. The problem goes beyond safety. Animals that are fed by humans lose their ability to forage naturally, become dependent on human food, and may even have to be relocated or euthanized as a result.
If an animal approaches you, do not feed it. This includes tossing scraps on the ground near an animal, which counts as feeding under the regulation.
3. Flying a Drone Without a Permit
Drones are prohibited in nearly all national parks, and this one catches many visitors off guard because drone use has become common almost everywhere else.
The National Park Service closed park units to the launching, landing, or operation of unmanned aircraft through Policy Memorandum 14-05, issued in 2014. That policy was implemented under the authority of 36 CFR §1.5, which allows park superintendents to restrict activities in order to protect park resources, wildlife, and visitor experience.
As a result, launching or landing a drone anywhere within a national park boundary is generally prohibited unless the park superintendent has granted specific authorization.
The restriction exists for several reasons. Drones can disturb wildlife, interfere with emergency operations such as search and rescue or wildfire response, and create safety risks in crowded areas. The noise also disrupts the quiet setting many visitors expect in national parks.
Permits for drone use are extremely limited and are usually granted only for research, official park operations, or approved media projects. If you did not receive permission from the park in advance, assume drone use is not allowed.
4. Getting Too Close to Wildlife
Getting too close to wildlife can be illegal in national parks, even when the animal seems calm.
Under 36 CFR §2.2, visitors are prohibited from feeding, touching, teasing, frightening, or intentionally disturbing wildlife. That includes approaching animals in a way that disturbs or displaces them.
Many parks use minimum distance rules to enforce that protection. In Yellowstone, visitors must stay at least 25 yards from bison, elk, deer, and most other wildlife, and at least 100 yards from bears, wolves, and cougars.
Those distances are not suggestions. Rangers can issue citations to visitors who approach animals too closely, especially when people leave vehicles or trails to get a better photo.
The rule applies even if the animal moves toward you. If a bison walks toward your vehicle or campsite, you are responsible for backing away and creating distance.
5. Bringing Pets on Restricted Trails
Many national park visitors assume that a leashed pet is always welcome. That is not how it works.
Under 36 CFR §2.15, pets are prohibited in park buildings, certain public areas, and any trail or area the park superintendent has closed to pets. Even where pets are allowed, they generally must be restrained on a leash no longer than six feet.
Most national parks limit pets to developed areas such as parking lots, campgrounds, paved roads, and certain designated trails. Backcountry trails and wilderness areas often prohibit pets entirely.
The reasoning is wildlife protection. Pets carry scents and behaviors that can disturb native animals and create problems in sensitive habitat.
Before your visit, check the pet policy for the specific park and trail you plan to use. Do not assume a leash makes it legal.
6. Building a Fire Outside a Designated Ring or During a Fire Ban
Campfire regulations in national parks fall under 36 CFR 2.13, and violating them can result in a criminal citation, not just a fine.
Fires must be built only in designated fire rings or grates. Building a ground fire, even in an open clearing that seems harmless, is prohibited. During fire bans, which are declared regularly during dry seasons, no open fires are permitted anywhere in the affected area regardless of conditions at your specific site.
A recent federal case involving a fire on National Park Service land shows how these rules can end up in court. In United States v. Carey, a defendant challenged charges under 36 CFR 2.13 after being accused of lighting a fire outside a designated area. The court rejected his argument and held that the NPS fire regulation applied.
Always confirm fire regulations for your park and dates before your trip. Current fire conditions are posted on each park’s NPS page.
7. Camping Too Close to Streams or Rivers
That spot right next to the creek. The one with the sound of running water and the perfect view. Almost every camper has wanted it.
In many national parks, camping directly along streams or rivers is restricted or prohibited. Under 36 CFR 2.10, park superintendents set the rules for where camping is allowed, and many parks require campers to stay well away from water sources or use designated sites.
The reason is simple. Streambanks are fragile, wildlife depends on those water corridors, and heavy foot traffic near the water causes erosion that can take years to recover.
Backcountry guidelines often recommend camping at least 200 feet from water, and some parks enforce similar distances through their local regulations.
When in doubt, the safest approach is to camp at designated sites or check the park’s backcountry rules before setting up.
8. Using a Metal Detector
Metal detecting is prohibited in national parks.
Under 36 CFR §2.1(a)(7), possessing or using a mineral or metal detector within a national park is illegal unless you have a specific permit from the National Park Service.
The rule exists because national parks contain thousands of archaeological and historical sites. Artifacts such as tools, coins, and other objects provide important information about the people who lived in or traveled through these landscapes long before the parks were created.
Even casual metal detecting can disturb those sites. Digging to retrieve an object can destroy the surrounding archaeological context that researchers rely on to understand history.
Because of that risk, recreational metal detecting is not allowed in national parks. If you brought a detector along for a camping trip, it needs to stay packed away.
9. Hiking Off Trail in Restricted Areas
Hiking off trail is not automatically illegal in every national park. Some parks and trail systems allow dispersed hiking in certain areas.
What is illegal is hiking off trail in an area that has been closed, posted as off-limits, or restricted by that park’s superintendent. Under 36 CFR §1.5, park superintendents can close areas, limit public use, or restrict certain activities. Violating those closures or restrictions is prohibited.
Those closures usually exist for wildlife protection, habitat preservation, archaeological protection, or visitor safety. A short detour can still cause damage if it crosses a sensitive area.
The practical rule: if a sign, map, ranger, or park regulation says to stay on the trail, stay on the trail. When in doubt, ask a ranger before you hike, not after.
10. Carving, Marking, or Scratching Trees, Rocks, or Other Natural Features
Carving initials into a tree or scratching a name into a rock can feel like a small, sentimental act. In a national park, it can be a federal violation.
Under 36 CFR §2.1, natural features such as trees, plants, rocks, fossils, and other park resources are protected from disturbance, damage, or removal. Carving, scratching, painting, or otherwise marking those surfaces can violate that regulation because it damages protected resources.
Rangers regularly encounter carved trees and scratched rock faces throughout the park system. Unlike a footprint in the dirt, these marks do not fade quickly. Some remain visible for decades.
What seems like a harmless way to leave a memory can permanently damage the very landscapes people come to see.
How to Stay Legal on Your Next Visit
The best single resource before any national park trip is the NPS website for the specific park you are visiting. Each park page lists its regulations, current fire conditions, pet policies, and any active closures. Rules do vary between parks, and what is permitted at one may not be permitted at another.
When something seems unclear, ask a ranger. That is what they are there for, and most are happy to answer questions before a violation happens rather than after.
National parks belong to all of us. Knowing the rules is the easiest way to make sure they stay worth visiting for everyone who comes after us.
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