JP's routes are both great. Here's another "if you have time" option that has a little more climbing, and a nice, long descent along Camino San Rafael:

Lida (From Linda Vista)
R Figueroa
(turns into) Chevy Chase (North)
L Inverness
L Berwick
R Hampstead
L Sherwood
R Kirkham
R Chadney
(turns into) Flintridge Dr
(turns into) Camino San Rafael
(turns into) Mountain

...then continue on Mountain along the route JP describes:

R Maryland
L Kenneth
L Sonora
Continue Riverside
R Buena Vista