Sierra Mac specializes in Tuolumne River Rafting, Merced River RaftingandYosemite Rafting Trips. We were the first outfitter on the Merced and Tuolumne Rivers and the pioneer in Class V commercial rafting on Cherry Creek! 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 look forward to an exciting 2017 rafting season. 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 Main Tuolumne, Cherry Creek/Upper Tuolumne, or Merced rivers.