 For this reason, visitors are asked to observe certain necessary regulations to keep the waters pure.There are also blooms of toxic blue-green algae in the lake during the summer and fall that make contact with the water dangerous.Anthony Chabot Regional Park and Lake Chabot Regional Park offer a number of activities including family and group camping, hiking, equestrian trails, bicycle trails, nature study, picnicking, golf, fishing, boat rental, a marina, a restaurant and boat tours of the lake.