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Official Trailer

Deep within the Grand Canyon's vast wilderness are secret and intimate tributaries rarely visited by man, hiding some of the Canyon's most remarkable features. The barrier to entry is steep. To explore them, one must have a knowledge of backpacking, packrafting, rappeling, anchor building, and off-trail navigation. The Last of the Great Unknown is the story of these slots, the canyoneers who systematically explored their drainages, and the secrets hidden deep within their walls.

"You cannot see the Grand Canyon in a single view...
To see it, you have to toil from month to month, through its labyrinths."

John Wesley Powell, 1869