The course is a 1.695-mile trail loop. Runners do as many laps as they can in 6, 12, or 24 hours.

Above: a very leisurely 8:00 a.m. start, with 24 hours ahead for most runners; about 32 degrees at starting time

Finishing the third lap, 5.1 miles

After six laps, 10.2 miles

Above and below: after the 15th lap, 25.5 miles; above right: I threw away the banana and kept the peel

Above: the finish, 27.12 miles