Our History
For over 50 years Sierra Mac has guided thousands of guests on the rivers of Yosemite. Owner Marty McDonnell was the first permitted outfitter on both the Merced and Tuolumne Rivers. In the 1980’s he pioneered the Cherry Creek/Upper Tuolumne. More…
Experienced Guides
When it comes to rafting Class V whitewater you need the best guides in the business. You won’t find a crew on the Tuolumne River with more years on the water and better credentials than Sierra Mac. Trust your vacation to the experts. More…
Closest To Yosemite
The Yosemite region has been our home for over 45 years, let us share it with you. Our headquarters is located on Highway 120, just 15 miles from Yosemite National Park’s Northwest Entrance. Many of our guests combine their raft trip with a visit to Yosemite. More…
Rave Reviews
Our guests say it best. Your rafting experience and safety are our top priority. Paying attention to details and making sure our guests are happy is our primary focus. Read our great reviews on Google Plus, Yelp and Trip Advisor. More…
Preserving Rivers
Since it’s inception, Sierra Mac has been a strong advocate for river conservation and environmental causes. As a charter member of the Tuolumne River Trust, we were active in the effort to gain the Main Tuolumne’s federal Wild & Scenic River status. More…