There is only one trailhead, so you'll be backcountry backpacking it in and back out. This backcountry hike shouldn't take more than 6 hours, but you never know stuff could go wrong and you could get stuck so be prepared for that. Sand Lake Trail goes through some very different elevations, and that means that some parts of the backpacking trail could be very different from other parts of it. This is a long backcountry hiking trail, so do pack enough food to last the whole trip. The total elevation difference for Sand Lake Trail is 1,973 feet which is about average. Being 7 miles long it's an average length backpacking trail.