The Fort Clinch 100 is a 10 mile loop that will test both road and trail runners alike. It is a mix between roughly 5.7 miles of continually undulating, twisting, mostly shaded oak hammock single track trail; over 3 miles of paved road; about .5 miles of loose sandy beach; and roughly 1 mile of boardwalk and Florida’s longest concrete fishing pier. The trail runs through forest that grew on top of ancient sand dunes, so the hills are very short but steep and tend to come one right after another. The road sections are mostly false flats. The loose sand will bog you down. The solid concrete pier will beat up your legs. Added up over 100 miles the cumulative gain/loss is just under 9000′.