The gorges: technical footing, constant vertical
This is where the 10,203 feet on the 50 mile actually comes from: not one big mountain, but repeated drops into and climbs out of steep-walled gorges, over and over across the loop structure of the course. The stone staircases, some of them historic, built decades ago, demand real attention on tired legs late in the race.
The waterfalls make this one of the more scenic ultras in the Northeast, but do not let that distract you from the footing. Roots, wet rock near the falls, and uneven stone steps are the norm here, not the exception.