Visit the park's main visitor center and bookstore at Canyon View Information Plaza ? only accessible by free shuttle bus, a one-mile walk or bicycle ride from Market Plaza on the Greenway Trail, or a short walk from Mather Point. During the winter months, the Visitor Center is open daily from 9:00 a.m. to 5:00 p.m. The bookstore is open daily from 8:00 a.m. to 5:00 p.m. Outdoor exhibits may be viewed anytime