The San Joaquin River NWR is open daily from one-half hour before sunrise to one-half hour after sunset.Please note that ALL areas of the refuge are closed to
public entry unless otherwise explicitly posted as a nature
trail, wildlife observation area, or parking lot. National Wildlife Refuges are managed for
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Riparian brush rabbits are possibly California's most endangered mammal. By the 1990s, their numbers dwindled to near extinction due to habitat loss and degradation. The Refuge is home to the largest wild population of riparian brush rabbits in the world.