I don't if anyone here is familiar with the sim Assetto Corsa but a full 900 km2 highly detailed mod of these exact LA canyons released just two days ago and it is incredible. To top that off the game also has a 1M, along with a heavily modified version of it with 400+ hp and suspension mods. I was literally just ripping down these same mountains, in the same car last night with friends, from the comfort of my home on the east cost.
Here's a nice video of it:
https://m.youtube.com/watch?feature=...me_continue=67
Sorry for the off topic, it's just too much of a coincidence to not say it!