That's a great loop... and it's one that's been on my radar for a while now... Using Glendora Ridge Road (12 miles of single lane along a mountain ridge) unfortunately it's pretty close on the physics range limit (all the way around) for AC... So it's probably not something that will happen for AC1.another popular run in SoCal is GMR to Baldy Fork you can make a loop
https://www.google.com/maps/place/F...c4293122c4778!8m2!3d34.2040277!4d-117.8088695