It is in San Diego, its 4 min from my house, its on japatul ln.
go to google maps and type in Loveland Reservoir, CA
and it should pop up,
the bad part is you have to park in a parking lot and hike down to it.
but no water contact.
Basically you park in a parking lot, everything is free, you can't use a float tube or anything. and you have to hike down to the lake. but besides that its a nice lake.