Brief report:
A spicy gully climb with the hard snow we encountered. It had been unseasonably cold the past three days. Climbed the St. Jean couloir with Brad and Mark. We started up at 4:23am from our camp at Red Lake and summited by 9:50am. BTW, the register is full. Whoever goes next please bring a notepad for the summit register. I screwed up on the descent and went down to the lowest saddle by Prater. Had to climb back up 500 feet to find the correct Red Lake pass (elev ~ 12,950') descent. Reached camp at 12:50pm. Took just 2 hours to hike out back to the Red Lake trailhead (6,568'). We had excellent weather both days.
Additional info about climbing Split Mountain can be found here.