Nice ride 2x6.
Are you talking about the big S curves on Placentia Ave between Imperial and Bastanchury? That quickly became part of my "race track" when they put that road in. Used to do about 100 through there on my bike - nicely banked, smooth as butter, good sight lines,... too many houses there now though.
The roads to Lake Matthews in Corona/Riverside is fun, but a little bumpy. The road to Silverwood Lake off the 15 (I forget the name of the exit, but it's the exit right before the grade steepens) is smooth, tight and twisty. Go past the lake and you'll find an awesome road up the back of the mountain to Crestline/Lake Gregory.
