There is only one trailhead, so you're looking at an in and out walk. You should count on this hike taking about 3 hours, but you never know stuff could go wrong and you could get stuck so be prepared for that. Bristlecone Pine Glacier Trail stays roughly within the same elevation zone the whole time, so you wonít have to worry about different climate zones along your walk. The total elevation difference for Bristlecone Pine Glacier Trail is 1,149 feet, and that is about average. Bristlecone Pine Glacier Trail is 3.4 miles long it's a shorter type walk. This is not a very long great outdoors hiking trail but it's always delightful to bring some emergency supplies, you never know what could happen. This vicinity does get very dry sometimes, so donít forget to check for any current fire restrictions before you go.