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Presented by Yosemite Mariposa County Tourism Bureau in partnership with Yosemite National Park and the Mariposa Museum & History Center Join us as we celebrate 100 years of Highway 140 and its legacy as Yosemite’s historic “All-Year Highway.” Tuesday, September 22, 2026 11:00 a.m.–1:00 p.m. Mariposa Museum & History Center, 5119 Jessie Street, Mariposa, CA 95338 Procession | 11:00 a.m. The celebration will begin with a procession of vintage automobiles traveling from downtown Mariposa (starting at the Mariposa Gazette building) along Highway 140 to the Mariposa Museum & History Center. Participants are invited to watch the motorcade along the route from main street to the museum. Join Us at the Museum | 11:30 a.m. Program and reception will take place at the Mariposa Museum & History Center, beginning at 11:30 a.m.