Of course, this is an overnight hike, 2.5 days normally, so better have big a backpack to fit all the stuff you need. This hiking trail has a total elevation difference of 5,982 feet, and that is higher than average. Sourdough Lookout Trail goes through some very different elevations which of course means you need to be prepared for different conditions on different parts of the hiking and backpacking trail. Sourdough Lookout Trail is a one trailhead hiking trail, so you're looking at an in and out trek. Keep in mind that this is a long hiking and backpacking trail, so don't forget to pack enough supplies. Being 16.4 miles long; it's a long hiking and backpacking trail.