There is only one trailhead, so you're looking at an in and out walk. The total elevation difference for Old Baldy National Recreation Trail Loop is 1,696 feet which is about average. Keep in mind that this is a long backpacking and hiking trail, so do pack enough food to last the whole trip. Different parts of Old Baldy National Recreation Trail Loop are at very different elevations which of course means you need to be prepared for different conditions on different parts of the wilderness trail. Old Baldy National Recreation Trail Loop is 6.4 miles long it's an average length wilderness trail. Sometimes this backpacking and hiking trail gets really dry, so make sure you check current conditions and fire restrictions with local forest authorities before you head out. The time needed for this backcountry hike is roughly 5.5 hours, but you never know stuff could go wrong and you could get stuck so be prepared for that.