Trekking along the Markha River through "Little Tibet," one of the world's highest inhabited plateaus, we take in spectacular views of the Great Himalayan, Ladakh and Zanskar ranges. We'll cross two high passes at elevations up to 17,400'. Trails wind past willow groves, alongside patches of wild roses and through pastel canyons festooned with multi-hued prayer flags undulating in the breeze.