Zac Efron and brother new gear testers for Columbia Sportswear

Zac Efron and his younger brother Dylan scaled the Continental Divide mountain range for a new Columbia Sportswear campaign.

The Baywatch star and Dylan are the sportswear brand's new gear testers and recently traveled to Glacier National Park in Montana for their new job.

"I grew up in a small town surrounded by wilderness, so for me the clearest way to reconnect with myself to find myself is through the wilderness," Zac says. "We both get kinda cooped up in our lives."

The brothers started their trip at Lake McDonald in Montana, where they took a swim Zac calls "mindblowing".

They then hiked to the top of the Continental Divide.

"Literally, we climbed up the mountain," the High School Musical star continues. "We were the last ones out there. That's the cool thing about traveling. Every journey... you might find something incredibly special out there. This was hard!"