Fairly large network of gravel and grass roads that take you all over Pickney Island. Biking is really the best way to see the island and the wildlife that lives here. The island is completely flat and the only technical obstacles you'll run into are a few rooty sections of doubletrack. I saw a racoon, some wild turkeys, crabs, and many other birds on my trip. Nice place to ride some dirt while on vacation at the beach.