Motion - Season 4

Greg and two Motion Guest Hikers explore the narrow slot canyons of the Escalante River in southern Utah with the help of a top canyoneering guide company.

Greg and the crew lead eight viewers along a new, 30-mile section of the John Muir Trail in California. The group bonds quickly as the elements and the tough terrain take their toll during their amazing adventure through some of the most rugged country in the High Sierra.

Greg shares the wonder of Yosemite National Park with two hikers who have never been.

With the company of two Motion viewers, Greg sets out to explore some of the largest subtropical wilderness in the United States. Inland marshes, mangrove jungles, and raw, wild islands make Everglades National Park one of the most diverse places in the country.

Dry Tortugas National Park is one of the smallest national parks in the country and is heavily visited by day-trippers from Key West. Greg and the Motion Crew discover this tiny group of islands and show you how an overnight camping trip here changes everything!

Wyoming's Shoshone National Forest is one of the best spots in the country to enjoy winter with its jagged peaks and snow covered foothills. There is a unique way to experience this Alpine magic without roughing it in the wild -- Brooks Lake Lodge.

Monterey Bay is a place where California's rugged coast opens up to a sprawling bay. It is a destination for wildlife and one that will take our guest hikers -- Debi and Ron -- by surprise. Debi and Ron are from Chicago and this was their first trip to California. They have left the cold weather to come and explore this coastal paradise with Greg for two days.

Utah's Arches National Park is a place where desert sands have formed into impossible sculptures. It is one of the most popular national parks in the west but it is easy to escape the crowds if you know where to look. For three Motion guest hikers, walking these amazing sand sculptures is a dream come true.

With its magnificent alpine peaks and breathtaking mountain landscapes, Grand Teton National Park in Wyoming is a must see. Find out how an off the beaten path through this incredible terrain becomes an unforgettable adventure for two sisters.

You will find a rugged setting of spires, canyons and wide-open grasslands at Badlands National Park. While its name does a good job describing the park, there is an amazing amount of life, color and magic that's easy to discover if you know how and where to look.

A viewer with an inspiring story of weight loss and her close friend join Greg for a look at one of the country's most scenic desert regions -- The Canyonlands.

There's more to the Black Hills of South Dakota than Mt. Rushmore. It is also home to the diverse Wind Cave National Park -- where you will find one of the world's largest and most unique cave systems. Above ground, it is a landscape of pine forest, hills, native grasslands, and abundant wildlife.

The British Virgin Islands in the Caribbean Sea are a sailor's paradise. With a little nautical experience, these tropical islands are easy to navigate and offer some of the most breathtaking views both above and below the surface of the blue waters.

St John in the U.S Virgin Islands offers some of the most beautiful tropical scenery in the world. Greg and the Motion crew experience the raw beauty of St. John and the Virgin Islands National Park with guest-hiker Angela. St. John is famous for its white sand beaches but there is plenty to marvel at below the surface of the clear blue waters.

Motion started when two unlikely worlds came together. Two brothers with completely different backgrounds -- one was a TV producer and photographer and the other was a pro-mountain guide -- created a unique kind of outdoor show that captured America's wild places.

Two guest-hikers set out on an adventure with Greg Aiello, host of Motion, to explore one of the most remote national monuments in the U.S. -- Misty Fjords National Monument in southeast Alaska. The monument, which is called the Yosemite of the North, features an expansive rainforest that is mostly untouched by human hands.