Barr Camp is it. As you hike up Barr Trail, you pass through several ecosystems. At the lower elevations, you find quaking aspen, larch, mountain ash, mountain mahogany, and the other softwoods of the foothills or lowlands. Higher up, you pass through the boreal highlands of pine, spruce, and fir. At even higher elevations, you find only bristlecone pines, which are scarred from centuries of lightning.
Bristlecone pines can be a thousand years old.
Barr Trail is a tremendously scenic trail. Again, signage, camps, and shelters don't dot and clutter the trail as at a lot of other places in Colorado. It is a difficult trail, and, as I said before, it ascends a total of 9,000 feet in 13 miles. At higher elevations, you've got to cross boulders, taluses, scree, puncheons, and ladders of rock. I've always thought that Barr Trail is like a good psychotherapist.