If it was just my friend and I I would say 4:30, however his wife is riding this as well so thats going to add time. I'm well aware of the curves and weather on Independence pass as I've been watching that area for a couple of weeks now. As far as your BIL goes I have no fear of him or his crew. I mind the speed limit and what not. I'm hoping to borrow a friends video camera for the ride down the pass towards Twin Lakes. Pic's willbe posted next week.