I’ve day hiked it four times: twice by itself and twice with Tyndall. My best time for the twofer was 18:39, car to car, when I was 60. It’s been done much faster than that. In early season, you may need crampons and an ice axe. Once the snow is pretty much gone from the couloir, you can do it with light hiking boots or maybe even trail runners. It’s a ton of work, but the only technical challenge is a bit of class 3 rock at the top of the couloir. Study the route descriptions carefully; it’s fairly easy to screw up.