Sierra Mac specializes in Yosemite rafting trips. We were first the outfitter on the Merced and Tuolumne Rivers and the pioneer in opening Class V Cherry Creek to commercial rafting. Founded in 1965, Sierra Mac is a locally based, family-owned business. We are located just 15 miles outside Yosemite's northwest entrance on Highway 120, perched above the Tuolumne River canyon. Our experienced guides are privileged to host your Yosemite rafting trip. We are expecting an exciting 2017 season for our Yosemite rafting trips. Escape the crowds and connect with yourself, your friends, and the rivers of Yosemite. Join us for a single or multi-day rafting trip on the Merced, Tuolumne or Cherry Creek.