Different parts of this wilderness trail are at very different elevations, and that means that some parts of the wilderness trail could be very different from other parts of it. You should count on this backcountry trek taking about 8 hours, but you never know stuff could go wrong and you could get stuck so be prepared for that. Jack Mountain Trail has only one trailhead, so in and out is the way to backcountry walk it normally. With its 9.4 miles of walking distance; it's considered a longer backcountry trek. The total elevation difference for Jack Mountain Trail is 4,860 feet, and that is higher than average. Jack Mountain Trail is quite long, so do pack enough food to last the whole trip.