BLM website description (link at the bottom) :

Sweeping mountain vistas and brilliant wildflower displays under the unceasing light of the midnight sun, the Pinnell Mountain National Recreation Trail offers an unforgettable experience whether your visit lasts a few hours or a few days.

Located approximately 100 miles (161 km) northeast of Fairbanks, this 27-mile (44 km) hiking trail traverses a series of alpine ridge tops entirely above timberline. The trail was built for hikers, but is open to all forms of non-motorized use.