August 26-27 – Three Forks Harbor (Muskogee)
From evensi.us: Try your hand at building a cardboard boat with family and friends, complete with decorations and flair, or come out to witness the handmade boats float down the river. On Friday night, enjoy the parade of boats and a harbor party, then on Saturday morning head out to the regatta. Watch as the boats race while the construction of each boat is tested. The River Rumba & Regatta is a great time for the whole family.