Oso is down in Rancho Santa Margarita, South Orange County I think. It's roughly half way between Los Angeles and San Diego via the 5 Fwy. It's a catch and release lake only that has drastic mood swings with respect to the bite. It also has a great variety of structure, both on the shoreline and under the water. Hey CJ, do you know how the water level is right now? Last time I was there, the water was down at least 12 feet (about a year ago). Thanks, Terry G.