I am a frequent flyer to the Mount Laguna Area. Here is a clip of one of my recent runs down that trail.
A while back I revisited the Santa Margarita River Trail and shot some video.
The placed has changed a bit with the primary thing being some “improvements” to the south side that has “tamed” some of the trails a little and made them slightly wider. To the east of the preserve the Red Mountain and “Hills Loop” I used to describe have been cutoff due to an property acquisition by an environmental group. There is still plenty to see out here and while summer is not the best time to be out here it was still a nice outing on the bike.