Ano Nuevo Elephant Seals: From mid-December through late March, daily access to the reserve is available via guided walks only. Most of the adult seals are gone by mid-March, leaving behind the weaned pups who remain through April. The elephant seals return to Año Nuevo's beaches during the spring (females) and summer (males) months to molt and can be observed during this time through a permit system. Reservations for a guided walk during the breeding season are available by phone. 
Año Nuevo State Park just north of Santa Cruz is a major gathering area for northern elephant seals, which may be seen year-round.