South Fork of Pawnee Creek is one of the few creeks running through the dry grassland. May 23, 2013 by Matt ThomasSouth Fork of Pawnee Creek is one of the few creeks running through the dry grassland. Pawnee National Grassland About Matt Thomas Matt is an avid writer and explorer, who loves to showcase his home state of Colorado. His favorite place to be is right here in the Centennial State. Previous Post:South Fork of Pawnee Creek is one of the few creeks running through the dry grassland.