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Acadia National Park, Maine -

A great park for dogs, they're allowed on 100 miles (160 km) of trails and 45 miles (72 km) of carriage roads. There's no swimming in lakes, and people aren't allowed to either. All campgrounds allow pets except Duck Harbor.

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White Sands National Park, New Mexico -

At White Sands National Park your pup can accompany you pretty much anywhere, including the nine miles (14 km) of in-park trails and the incredible white dunes.

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Petrified Forest National Park, Arizona -

Inside Petrified Forest, pets are allowed on all park trails, roads, and in official wilderness areas. However, they must always be kept on a leash and can't enter buildings. 

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Shenandoah National Park, Virginia -

Shenandoah boasts over 500 miles (804 km) of hiking trails, only 20 miles (32 km) of which are inaccessible to pets. This makes Shenandoah a dream for hikers looking to bring their pup.

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New River Gorge National Park and Preserve, West Virginia -

This national park allows pets on all in-park trails, including the famous Endless Wall Trail and the striking Grandview Rim Trail. 

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Cuyahoga Valley National Park, Ohio -

Leashed dogs are welcome on 110 miles (117 km) of trails at Cuyahoga, including 20 miles (32 km) of the Towpath Trail. Just steer clear of the East Rim mountain-bike area, park buildings, and the Scenic Railroad.

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Wrangell–St. Elias National Park and Preserve, Alaska -

At Wrangell–St. Elias, dogs can visit the backcountry, trails, and the Kennecott Mines National Historic Landmark area, but they can't enter visitor centers.

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Grand Canyon National Park, Arizona -

Pets are allowed on all the highly visited trails above the Grand Canyon's South Rim, including the 13-plus-mile (20 km) Rim Trail. While dogs can't ride shuttle buses or go below the canyon's rim, they're welcome at some in-park campgrounds. 

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Congaree National Park, South Carolina -

This national park allows pups on all the park trails and boardwalks. Pets are also allowed in park campgrounds.

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Yosemite National Park, California -

At Yosemite, dogs are allowed in all developed areas and on paved roads, sidewalks, and bicycle paths, including the Yosemite Valley Loop Trail.

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Indiana Dunes National Park, Indiana -

Indiana Dunes allows leashed dogs access to many beaches and to cool down in Lake Michigan. Dogs are allowed on all national park trails, except Great Marsh, Pinhook Bog, and Glenwood Dunes. 

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Olympic National Park, Washington -

While dogs aren't allowed on most Olympic trails, they can visit the Peabody Creek, Madison Falls, Spruce Railroad, and July Creek Loop Trails. Dogs are also welcome on all park campgrounds, picnic areas, and dirt and paved roads.

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Great Sand Dunes National Park and Preserve, Colorado -

This park allows dogs to wander the Dunes Overlook Trail, as well as the Mosca Pass Trail. They're also allowed to cool off in the Medano Creek. 

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Crater Lake National Park, Oregon -

Leashed dogs can walk several stunning trails within this national park, such as the Lady of the Woods and the Pacific Crest Trails. 

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Voyageurs National Park, Minnesota -

As one of the few water-based national parks in the system, dogs are allowed in all front-country campgrounds within the park and on private boats.

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Bryce Canyon National Park, Utah -

You can bring your furry friend on all paved roads, pullouts, and in the campgrounds. Leashed pets are also allowed along the paved shared-use path between the park entrance and Inspiration Point, and on the breathtaking path between Sunrise and Sunset Points.

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Zion National Park, Utah -

Dogs are welcome on the spectacular Pa'rus Trail, which borders the Virgin River and has stunning views of Zion Canyon. Pets can also share campgrounds and picnic areas, along with all public roads and the grounds of Zion Lodge. 

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Lake Clark National Park and Preserve, Alaska -

Pets are allowed on all the trails of this national park. Just keep in mind the risks of bringing a dog into the Alaskan wilds. Wolves, grizzly bears, and moose are all incredibly dangerous to both humans and pets, and dogs should be kept on a leash at all times.

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Capitol Reef National Park, Utah -

In Capitol Reef's central hub, there are a few dog-friendly trails, including the stunning path from the visitor center to the Fruita Campground, and along the Fremont River Trail.

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Badlands National Park, South Dakota -

Anywhere a car can go, so can dogs at Badlands, which means you and your pup can explore the Badlands Loop Road. Just steer clear of any prairie dog areas, such as Sage Creek Campground and Roberts Prairie Dog Town.

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Black Canyon of the Gunnison National Park, Colorado -

Dogs are welcome on park roads, in campgrounds, and at all pullouts, as well as on a handful of trails, including the Cedar Point Nature Trail, North Rim Chasm View Nature Trail, and Rim Rock Trail.

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Great Smoky Mountains National Park, North Carolina and Tennessee -

When visiting the Great Smoky Mountains, it's good to know you can bring your dog to campgrounds, picnic areas, and along roads. However, not on any dirt trails. 

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Glacier National Park, Montana -

Doggos aren't allowed on any trails or in the backcountry of Glacier National Park, but they can join you on any of the paved roads and at pullouts when you park.

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Denali National Park and Preserve, Alaska -

Leashed dogs can visit Denali Park Road and two trails near the park entrance, the Roadside Trail and the bike path. Pets are also allowed in park campgrounds, but must be leashed at all times due to wildlife concerns. 

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Joshua Tree National Park, California -

While dogs can't go on park trails or in the backcountry in Joshua Tree, they're permitted within 100 feet (30 meters) of roads, picnic areas, and campgrounds.

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Wind Cave National Park, South Dakota -

Dogs are allowed in the grassy areas near the visitor center and on the Prairie Vista and Elk Mountain Campground Trails. Pets can also stay at the campground, but may not be left unattended. 

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Everglades National Park, Florida -

In the Everglades, dogs are generally allowed where vehicles drive only. Leashed pups are welcome at picnic areas, along roadside stops, and on private boats touring the park.

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Yellowstone National Park, Idaho, Montana, and Wyoming -

While pets aren't allowed on trails, boardwalks, in the backcountry, or in geothermal areas, they can accompany you within 100 feet (30 meters) of roads, campgrounds, picnic spots, and parking areas.

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Theodore Roosevelt National Park, North Dakota -

Bring your doggo onto roads and sidewalks, as well as to picnic areas and campgrounds at Theodore Roosevelt. You and your dog can also enjoy all 36 miles (57 km) of the South Unit's Scenic Loop Drive.

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Big Bend National Park, Texas -

You're free to walk your dog along the park's many dirt and paved roads, and at car campsites. Dogs can't, however, walk on park trails, head into the backcountry, or swim in the river.

Sources: (Outside) (Travel + Leisure) 

See also: The biggest mistakes tourists make at national parks

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