When we were just there in Aug 2014, the Bodie Island Lighthouse, a National Park Service site, had been refurbished and was now reopened to the public for tours.
If you are adventuresome, you can walk to the top and get a great 360 degree view:
Or, look down the cool wrought iron spiral staircase that resembles the inside of a seashell:
The link to Ultrarunning is that there actually is a 100 miler along the Outer Banks in the spring, the Graveyard 100. It's been held the past couple or 3 years, but seems fraught with weather-related difficulties.
The race always appealed to me but it's road rather than trail, and its early spring date (7 March 2015) never suited. But I can still be intrigued by it....
For those interested in shorter distances, I see a 50K to be held on the Outer Banks on 2 May 2015. Check out the OBX Ultramarathon here.