The Yosemite Area Regional Transit System (YARTS) is the easiest way to experience the beauty of Yosemite National Park. Shuttles pick up from several locations in Mammoth and transport you to several locations in the park, with the final destination being Yosemite Valley. Instead of driving, you can sit back and enjoy the incredible scenery. You'll have over 5 hours in Yosemite Valley to explore the majestic waterfalls and monoliths before departing back to Mammoth Lakes.
Visit Yarts.com for current shuttle schedule and info.