Yes, dogs are allowed in most US national parks, but usually only in developed areas: roads, parking lots, campgrounds, picnic areas and some paved paths, on a leash no longer than 6 feet. Trails are the big difference between parks. Acadia, Shenandoah, Petrified Forest and New River Gorge allow leashed dogs on most or all of their trails, while Yellowstone, Rocky Mountain and Zion keep dogs off nearly all trails. Always check the individual park's pet page before you go.
This guide explains the federal rules that apply everywhere, why parks restrict dogs, how the rules differ between popular parks, and how to plan a trip so your dog is welcome and safe. All park details come from each park's official National Park Service pet page as of October 2026. Rules change with seasons, closures and construction, so confirm before you travel.
The rules that apply in every national park
Pets in national parks are governed by federal regulation, 36 CFR 2.15, plus each park's own rules. The federal rule bans pets from public buildings, public transportation vehicles and designated swimming beaches, and from any area a park superintendent closes to pets. It requires pets to be crated, caged or on a leash no longer than six feet, bans leaving a pet tied up and unattended, and bans allowing a pet to make unreasonable noise. Owners must also clean up after their pets.
In practice, almost every park adds the same everyday rules: no pets in visitor centers or on shuttle buses, no pets at ranger programs, and never leave a pet in a hot car. The National Park Service's pets page sums up the starting point: parks welcome pets in developed areas, on many trails and campgrounds, and in some lodging.
Why dogs are restricted on so many trails
It can feel unfair when a park lets you walk a trail but not your leashed dog. The reasons are about the park, not about your dog's manners. Dogs leave scent that can stress or displace wildlife, and they can carry diseases and parasites that affect wild animals. Wildlife can also be a danger to dogs: bears, coyotes, mountain lions, elk and bison may react to a dog as a threat or as prey. Some parks have their own hazards, such as Yellowstone's hot springs, where pets are banned from thermal areas because they can be badly burned or killed.
Restrictions also protect fragile ground, from alpine tundra to desert crust, and keep narrow, crowded trails safe for other visitors. Rangers enforce the rules, and breaking them can bring a citation, so it pays to know them before you arrive rather than at the trailhead.
The BARK Ranger program
Many parks run a B.A.R.K. Ranger program that turns the rules into something fun for dog owners. According to the NPS BARK Ranger page, the letters stand for Bag your pet's waste, Always leash your pet, Respect wildlife, and Know where you can go. Each park designs its own program: some offer a ranger walk, some a pledge, and some sell a tag or badge for your dog's collar at the visitor center.
Park-by-park: where dogs can go
The table compares popular parks, from the most dog-friendly to the most restrictive. Every park requires a leash of 6 feet or shorter.
| Park | Dogs on trails? | Key details |
|---|---|---|
| Acadia (Maine) | Yes, most trails | About 100 miles of trails and 45 miles of carriage roads; some cliff and ladder trails closed to pets; Sand Beach and Echo Lake closed to pets in summer |
| Shenandoah (Virginia) | Yes, most trails | Fewer than 20 of 500+ trail miles closed to pets, including Old Rag, Dark Hollow Falls and Bearfence Mountain; campgrounds and some lodging allow pets |
| New River Gorge (West Virginia) | Yes, all trails | Not in buildings or ranger programs; bring water for your dog |
| Petrified Forest (Arizona) | Yes | Paved roads and trails plus designated wilderness; fenced dog park by the Painted Desert Visitor Center |
| Grand Canyon (Arizona) | Rim trails only | Leashed pets allowed on trails above the rim on the South Rim; never below the rim; kennel near Maswik Lodge |
| Yosemite (California) | Paved paths only, mostly | Paved roads, sidewalks and bike paths, plus Wawona Meadow Loop; not on trails such as the one to Vernal Fall |
| Great Smoky Mountains (Tennessee and North Carolina) | Two trails | Gatlinburg Trail and Oconaluftee River Trail only; campgrounds, picnic areas and roadsides |
| Zion (Utah) | One trail | Pa'rus Trail only; not on shuttle buses |
| Yellowstone (Wyoming, Montana, Idaho) | No | Only within 100 feet of roads, parking areas and campgrounds; no trails, boardwalks, backcountry or thermal areas |
| Rocky Mountain (Colorado) | No | Roads, parking areas, campgrounds and picnic areas only; no trails, tundra or meadows |
Acadia: the classic dog-friendly park
Acadia is the park most dog owners have in mind when they search for dog-friendly parks. Its pet page says leashed pets are allowed on 100 miles of hiking trails and 45 miles of carriage roads. There are limits. The steep cliff and ladder trails, including Precipice, Beehive, Beech Cliffs and the Ladder Trail to Dorr Mountain, are closed to pets, and several others are not recommended. Sand Beach is closed to pets from June 15 to September 8, Echo Lake from May 15 to September 15, and most lakes are public water supplies where neither people nor pets may swim. Blackwoods, Seawall and Schoodic Woods campgrounds allow pets.
Shenandoah: almost every trail is open
Shenandoah may be the most trail-friendly major park for dogs. Its pet page says the trails closed to pets total fewer than 20 miles of more than 500 miles. The closures include some of the most popular hikes, such as Old Rag, Dark Hollow Falls, Stony Man summit, Bearfence Mountain and Limberlost, so plan around them. Pets are welcome in campgrounds, and pet-friendly lodging is available.
Petrified Forest and New River Gorge: open trails, fewer crowds
Two smaller parks are among the friendliest for dogs. Petrified Forest in Arizona lets leashed pets use any paved road or trail and even its designated wilderness areas, a rare allowance. It has a fenced dog park beside the Painted Desert Visitor Center parking lot, with separate areas for small and large dogs, and its BARK Ranger program is run from the entrance booths and visitor centers. Only service animals may enter park buildings, and summer heat on the open desert is a real danger, so go early.
New River Gorge in West Virginia allows leashed pets on all of its trails. Pets are not allowed in buildings, visitor centers or ranger programs, and the park advises bringing extra water because streams may carry bacteria or parasites and trailheads have no drinking water.
Grand Canyon: rim yes, canyon no
At Grand Canyon, the rule is simple. The park's pet page says pets are not allowed below the rim. On the South Rim, leashed pets can use trails above the rim, Mather and Desert View campgrounds, Trailer Village and developed areas, but not shuttle buses, and only Yavapai Lodge offers pet-friendly rooms in the park. If you want to hike into the canyon, the Grand Canyon Kennel near Maswik Lodge boards dogs and cats by the day or overnight, with proof of vaccinations required and reservations recommended. On the North Rim, pets are limited to the bridle trail linking to the North Kaibab Trail and the Arizona Trail north to the entrance station, and there is no kennel.
Yellowstone: plan for a car-based visit
Yellowstone is one of the strictest parks. Its pet page limits pets to developed areas within 100 feet of roads, parking areas and campgrounds. Pets are banned from boardwalks, hiking trails, the backcountry and thermal areas, even if carried. A dog can still enjoy the trip as a road-trip companion, with walks around campgrounds and pullouts, but someone will need to stay with the dog while others walk the geyser boardwalks. The park says pets may stay in a vehicle only for short periods with food, water, shade and ventilation, and recommends someone stay with them.
Yosemite, Zion, Rocky Mountain and the Smokies
Yosemite allows leashed pets on fully paved roads, sidewalks and bike paths, including the paved Lower Yosemite Fall and Bridalveil Fall trails and the road to Mirror Lake, plus the unpaved Wawona Meadow Loop. Pets are not allowed on other trails, in meadows, on beaches, in wilderness or in lodging, and the park reminds visitors that pet food is bear food. Zion allows pets on just one trail, the Pa'rus Trail from the visitor center. Rocky Mountain bans pets from all trails, tundra and meadows, and points visitors to national forest trails and open spaces outside the park. Great Smoky Mountains allows leashed dogs on only two trails, the Gatlinburg Trail and the Oconaluftee River Trail.
National forests and state parks: the dog-friendly alternative
If your heart is set on hiking with your dog, look just outside the strict parks. National forests and many Bureau of Land Management areas tend to allow dogs on most trails, often under looser leash rules, and many state parks are dog-friendly too. Rocky Mountain National Park's own pet page lists nearby national forest and county trails for dog owners. Check each area's rules, since leash requirements and seasonal closures vary.
Service animals are different
Trained service animals, meaning dogs trained to perform tasks for a person with a disability, are generally allowed in places where pets are banned, including park buildings, though they must still be leashed and under control. Emotional support animals are not service animals under these rules and are treated as pets. Several parks state this directly on their pet pages. Our guide to service dog public access rights explains the difference.
Keeping your dog safe on a park trip
- Heat. Desert and canyon parks get dangerously hot, and pavement can burn paws. Walk early or late, carry water, and never leave your dog in a parked car. Our guide on how hot is too hot for a dog in a car shows how fast a car heats up.
- Wildlife. Keep a short leash and give elk, bison, bears and moose a very wide berth. Store dog food like human food in bear country.
- Water. Bring clean drinking water. Streams and ponds can carry parasites and bacteria, and some lakes are off-limits for swimming.
- Altitude and terrain. High trails, rocky ground and long distances are hard on short-nosed, senior and unfit dogs. Build up before the trip.
- Waste. Pack out every bag. It is one of the most common complaints rangers hear about dogs.
- ID. Make sure your dog wears a tag with a working phone number and that its microchip details are current.
Camping with a dog in a national park
Campgrounds are usually the easiest place to enjoy a park with a dog, since most developed campgrounds allow leashed pets. There are exceptions, so check before you reserve: Yosemite, for example, bars pets from walk-in campgrounds such as Camp 4 and from group sites, and Acadia's Duck Harbor campground is listed as pet-restricted. At camp, keep your dog leashed, never leave it tied up and alone, bring it inside the tent or vehicle at night, and store its food securely, especially in bear country. Barking dogs are one of the most common campground complaints, and the federal rule on unreasonable noise applies.
What to pack for your dog
- A fixed 6-foot leash. Retractable leashes that extend beyond 6 feet break the rule in every park.
- Plenty of water and a collapsible bowl.
- Waste bags, and a sealed container to carry used ones until you find a trash can.
- Paw protection for hot pavement, sharp rock or snow.
- A copy of vaccination records, useful if you need a kennel near the park.
- A basic first aid kit and the number for an emergency vet near the park.
Planning the road trip around the park
National park trips with dogs are usually road trips, so plan the drive as carefully as the park. Build in a break at least every two to four hours, with water and a short walk. Our guides on how long a dog can travel in a car and road trips with a dog cover pacing and packing. Pet-friendly lodging inside parks is limited and books out early, so many owners stay in nearby towns or camp. Our list of hotels with no pet fee can help keep costs down, and if you are traveling by camper, see our guide to traveling with a dog in an RV.
When your dog cannot come along
For strict parks, it can be kinder to leave your dog with a sitter or a boarding facility near home, or to book a local kennel near the park for the days you plan to hike. Grand Canyon's in-park kennel is unusual; elsewhere, look for boarding in the gateway towns and book ahead in summer.