is the map link the loop you plan to hike ?
its about a 20 mile loop.
the entire loop is part of the San Diego 100 course which I've done a few times, so I train on these trails, can give you some input.
the entire loop is just north of the recent Chariot fire burn area.
would you go clock wise or counter clockwise ?
if you are short for time, and new to the west, it is a decent enough loop, fun to run anyways.
3-4 miles in the Pine Mt area may be a dirt road but the rest is nice single track.
also there are numerous side trails that may confuse your progress, mostly in the Pine Mt area, so you will want a good map.