At parts of the year this area sees very little rain, so do check for current fire restrictions before you go if you plan to bring a stove or make a camp fire. With its 3.4 miles of walking distance it's a short hiking trail. McKinley Firebreak has a total elevation difference of 2,228 feet which is an average number. This is not a very long backpacking trail but you should still bring some emergency supplies just in case something happens. The time needed for this trek is roughly 3 hours, but you never know stuff could go wrong and you could get stuck so be prepared for that. There is only one trailhead, so you'll be backcountry backpacking it in and back out. Different parts of McKinley Firebreak are at very different elevations, so keep in mind that you may need to dress differently at different elevations.