Pop superstar Nick Jonas joins Bear for a thrilling, chilly trek through the snowy mountains of the Sierra Nevada.

Actress, singer, dancer, adventurer? Julianne Hough joins Bear for an emotional and breathtaking journey in the African Savanna.

Bear takes actress Courteney Cox on a harrowing and emotional trek through the Irish Highlands.

The basketball legend joins Bear in the Adirondack Mountains for a strenuous hike filled with laughs and Shaq's witty insights.

America's Got Talent judge and pop icon Mel B roughs it with Bear on the shark-infested waters of the Irish coast.

Super Bowl champion Marshawn Lynch puts his survival skills to the test on a two-day adventure with Bear in Corsica.

This Is Us star Sterling K. Brown steps outside his comfort zone to join Bear on a trek through the icy mountains of Colorado.

In honor of Red Nose Day, Oscar-winning actress Julia Roberts accompanies Bear on a two-day wilderness trek to deliver lifesaving vaccines to a remote Kenyan village.

Vanessa Hudgens joins Bear Grylls on an adventure in the High Sierra.