Mail postcards and letters with the Yosemite National Park postmark to family and friends. The Wawona Post Office is in the same building as Wawona Store which is located on the Wawona Road (continuation of Highway 41 inside the park) in Wawona, near the Wawona Hotel. Operating Hours & Seasons Open year-round. Monday - Friday: 9 am to 1 pm Saturday: 9 am to 12 pm Sunday: Closed Closed on federal holidays Questions? Call (209) 375-6574. Accessibility This facility is wheelchair accessible. Designated accessible parking spaces are available nearby.