Backpacking the Sierra to Mt. Whitney (14,505 ft.) can be a life-changing experience. Join us at REI Concord to learn all you need to know to complete a multi-day trans-Sierra backpacking trek to Mt. Whitney.

Co-founder of the Trans-Sierra Xtreme (TSX) Challenge, Chris Casado is passionate about exploring the Sierra backcountry. He's spent countless summers camping in secluded lakes basins, crossing high alpine passes, following rushing rivers, and climbing majestic peaks. Join Chris for a…

Backpacking the Sierra to Mt. Whitney (14,505 ft.) can be a life-changing experience. Join us at REI Mountain View to learn all you need to know to complete a multi-day trans-Sierra backpacking trek to Mt. Whitney.

Backpacking the Sierra to Mt. Whitney (14,505 ft.) can be a life-changing experience. Join us at REI Marina to learn all you need to know to complete a multi-day trans-Sierra backpacking trek to Mt. Whitney.

Backpacking the Sierra to Mt. Whitney (14,505 ft.) can be a life-changing experience. Join us at REI San Francisco to learn all you need to know to complete a multi-day trans-Sierra backpacking trek to Mt. Whitney.

Backpacking the Sierra to Mt. Whitney (14,505 ft.) can be a life-changing experience. Join us at REI Fremont to learn all you need to know to complete a multi-day trans-Sierra backpacking trek to Mt. Whitney.

Backpacking the Sierra to Mt. Whitney (14,505 ft.) can be a life-changing experience. Join us at REI Santa Rosa to learn all you need to know to complete a multi-day trans-Sierra backpacking trek to Mt. Whitney.