8h 47m 20s
Started just before 5:00AM from Vivian Creek trailhead and made the summit of San Gorgonio in 2:47 including a stop to filter water at high camp. Having done most of the summits before on shorter hikes, route finding went smoothly. I made it to San Bernadino Peak in 6:01 and was hoping push my pace down Momyer, however as others have noted it was very overgrown and indistinct.
I only jogged the last mile of Momyer, however much of this route is on well graded trail and could be run. If run rather than hiked, this route could easily be pushed under 5 hours.