A California fishing license and daily permit are required. Lake Jennings is home to more than finny creatures, of course. Desert cottontails are the commonest animals in the park, and they are joined in the brush by black-tailed jackrabbits, California ground squirrels, and western harvest mice. Coyotes are frequently heard at night, though they are seldom seen by day. Bobcat, possum, striped and spotted skunk, and mule deer are other animal visitors.
Bird life is quite varied.
The lake supports flocks of waterfowl during the winter, and the chaparral is home to one of the county's rarer residents, the cactus wren. Other birds you might see include wrentits, red-tailed hawks, and several species of sparrows in winter. Facilities Lake Jennings County Park is especially suited for recreational vehicle campers. A sizable number of the nearly 100 sites are pull-through full hookups, with many more being partial hookups. Groups can reserve an enclosed clubhouse.