"Santiago Peak is the southern mountain of Orange County's Saddleback formation. It is the highest and most prominent peak of both the Santa Ana Mountains and Orange County, and also marks a border point with Riverside County." - Wikipedia
There is a Strava segment for this 7.7 mile route. But note that Strava can report times that are off by many seconds, so it is best to report your actual time here.
Virtual 50 miler