The roads leading to Mount Baldy Village are closed to cars every 4th of July and lots of cyclists go up there. It's about 25 miles and 5000 feet of gain to the Village where I usually turn back. If you go the additional 4 miles up to the end of the road where the ski lifts are it gains 2000 more feet. Lots of 15% in that section.
I might go Saturday but probably not the last 4 miles.