A tough hike on the Skyline/Skinsuit Trail in Corona, California.

Now that I've done this hike, I can advise you to do this loop clockwise! I did it anti-clockwise and the first 6 miles are mostly uphill, and the remaining 3.4 miles is full of steep descents over loose gravel and sand. It's a beautiful trail, but it'll test you.
www.alltrails....