Dropped

The Keefer brothers put boots to ground as their journey through Alaska begins. Armed with nothing but a couple of Glock 20s, the brothers immediately begin their search for their first supply-yielding cache.

The Keefer brothers awaken to a frozen tundra. With over 8 miles to cover and no oars, the brothers are forced to trudge their way through shallow water and barren earth as they head downstream in search of the second cache.

The terrain begins to change as the Keefer brothers are forced to make their way downstream. The landscape tightens its grip and funnels the brothers to a geographic choke point where both predator and prey gather.

The Keefer brothers take shelter in a small pine outcropping as a winter storm sets siege.

The Keefer brothers make their way downstream in search of their next supply cache.

With lifted spirits, the Keefer brothers set out to spot and stalk a herd of caribou.

With red meat, the Keefer brothers are finally able to replenish their depleted energy, but they aren't the only ones looking to survive the winter in the Alaskan wilderness.

The harsh reality of winter sets in and the Keefer brothers must sleep with one eye open as a grizzly patrols the area around their camp.

The Keefer brothers race downriver to reach the next supply-yielding cache.

The Keefer brothers fight their way downstream through freezing water and strong headwinds.

Chris and Casey Keefer recount their most memorable moments from this year's journey to Alaska's Brooks Range.

Chris and Casey Keefer share their favorite episode, and what it was like to experience it firsthand.