There is a lot to do in the area including going for a hike!
Bring a rod and tackle! Huntington Lake and nearby creeks offer great trout fishing. Check out Indian Pools, a short hike starting from China Peak back parking lot. It is a good place for creek fishing and swimming.
If you are into mountain biking, take advantage of China Peaks trails!
Spend the day on the lake! Rancheria Marina has many rental options from kayak to pontoon boats.