I am using a topo map while posting this. First off, I have not been to these areas. Although, I believe others have spoken of the Summit Valley area, I am not sure where to enter that area. Here is another that shows easy access from my map.

From Ontario: take I-15 NORTH pass 138. EXIT Ranchero St. Go right (east). You will cross the duct.
IF THERE IS NO EXIT AT RANCHERO ST. -
Here is another: same as above except EXIT at Phelan Rd. Go right (east). The duct is there real soon.

BankLber. caught an 11 lb. striper on a 7" swimbait. Not there but in the duct.