"Winter is a wonderful time not only to watch the annual Pacific gray whale migration from Alaska to Mexico, but also to celebrate the recovering populations of northern elephant seals as they return to breed at Point Reyes," Superintendent Cicely Muldoon said
The shuttle bus service, now in its 16th year, eases traffic congestion at prime viewing areas that include the Point Reyes National Seashore's historic lighthouse and Chimney Rock headlands, the park's spokeswoman Loretta Farley said.
The bus service runs only on weekends and federal Monday holidays in good weather. Ticket sales are between 9:30 a.m. and 3:30 p.m. at the Ken Patrick Visitor Center at Drake's Beach.
Adult tickets are $5, children under 16 and under are free and federal senior and access pass discounts apply.
Sir Francis Drake Highway is closed between 9:30 a.m. and 5:15 p.m. at the South Beach junction when the busses are operating.
More information is available at the Bear Valley Visitor Center at (415) 464-5137 and at www.nps.gov/pore.