During the entire Chattajack course you will pass one significant island, Williams Island. You will reach the tip of this island right around mile 7 where the river will split into two channels going around the island. Chattajacks are encouraged to take the river left channel as there is typically less boat traffic on that side but always go where you feel safest. You will paddle 2 miles before reaching the end of the island at which time the opposing channel will rejoin form