Hemet, CA 92545
One of the largest reservoirs in Southern California, at 800,000 acre feet (990,000,000 m3) of water. Enjoy boating, fishing, camping, wildlife, etc. Diamond Valley Lake is embarking on a substantial trail system that will allow visitors to hike and ride through the hill surrounding the reservoir. The first set of trails are along the north hills overlooking the lake, and another circumnavigates the lake.