Rock the Park: A Guide to America's National Parks

The guys visit one of the last undeveloped beaches on the Atlantic coast. Cumberland Island National Seashore is home to tons of wildlife, and Jack and Colton see it all, including manatees, manta rays, alligators, and wild horses.

The watery world of Dry Tortugas National Park has Colton and Jack taking their exploration into the sea, diving deep to check out one of the largest coral reefs in the world and the marine life that call it home. They see stingrays, goliath groupers, and even nurse sharks.

Jack and Colton head deep into the woods to learn about the amazing life of black bears. Then, no stone goes unturned as they search for some of the tiniest inhabitants of the Great Smoky Mountains. Finally, it's a lung-busting hike to the top of a Smoky Mountain peak for a stunning view.

Colton and Jack hit the beach for a raucous wind surfing race. Then it's hush-hush in the hatching room where the guys see endangered Kemp's Ridley sea turtles emerge from their shells before making their own mad dash to the ocean.

Jack and Colton explore the iconic sea caves carved into the cliffs of Lake Superior. Above the waves, they use kayaks, and below the surface, scuba gear. They even check out a 100 year old shipwreck sunk by Superior's wrath.

Jungle Jack Hanna joins the guys on a story-filled hike through bear country. The guys get a good look at a grizzly and take on some of the roughest white water rapids they've ever experienced.

Jack and Colton are in Denali National Park, traversing a crevasse-laden glacier to take on their first Alaskan Peak!

Remote wilderness takes on a whole new meaning as Colton and Jack take on the white water ride of their lives in Alaska's Aniakchak National Monument.

Lava caves and cinder buttes are giving Jack and Colton a park experience like no other as they explore the strangest 75 square miles in North America, in Idaho.

Colton and Jack are taking on Denali and hoping to spot all of the park's Big Five: moose, caribou, Dall sheep, wolves, and grizzly bears. Then, they spend some time with the Denali sled dogs and the pups in training.

Jack and Colton team up with U.S. Secretary of the Interior, Sally Jewell, for a hike up Mount Rainier.

Jack and Colton are in Grand Teton National Park for the biggest challenge of their lives, climbing the Grand!

Jack and Colton are checking out The Rockies the same way visitors have for centuries, by hoof and by foot. Then, they face an unexpected challenge while rock climbing a rock formation called the Twin Owls.

The guys hit the cliffs and canyons of Capitol Reef National Park in Utah to explore the history of the first settlers who called the land home.

Colton and Jack head to Maine's Rocky Coast for a taste of Acadia National Park. Spotting seals and dolphins, bald eagles, and peregrine falcons, it's an unforgettable wildlife adventure down east!

Colton and Jack are road trippin' through South Dakota. After a stop in Custer State Park, they'll do their best not to get stuck in Jewel Cave or lost in Badlands National Park.

Jack and Colton mess with Texas and Texas strikes back. Rattlesnakes, intense heat, and the Rio Grande's rock slide give the guys all they can handle in the Lone Star State.

Colton and Jack are exploring the island of St. Croix both above and below the water's surface. After lighting up the night in a bioluminescent bay, they head into another kind of darkness: a wall dive into the abyss.

Jack and Colton are in Virgin Islands National Park in St. John, USVI. After hiking through the island's history, they'll trade in sunshine for moonlight to take on their first night scuba dive.

Mother Nature and elevation really push the guys to their limits while trekking up the tallest peak in Great Basin National Park. After that, it's all downhill and underground when they go on a wild caving mission for the park.

Colton and Jack are in for some ups and down while visiting Yosemite National Park in California. Then they get their hands dirty while learning about the parks efforts to reduce trash going to landfill.

From grizzly bears and bison to salamanders and baby sea turtles, Jack and Colton come across animals of all shapes and sizes during their adventures. It's a look back at all the best of big and small wildlife in our national parks.

The varied landscapes of the national parks push Jack and Colton to the limit as they look back at some of their greatest adventures.

Whether it's shooting rapids, diving deep, kayaking caves, or climbing ice, it's easy to get a little wet and wild in the national parks. Jack and Colton look back at some of their best water adventures.