Pumpkin Patch & Corn Maze! The Kilchis River Pumpkin Patch & Corn Maze at Hydrangea Ranch is open from noon-9 p.m., Sat. and noon-5 p.m., Sun. It proudly boasts the largest corn maze on the Oregon Coast. U-Pick specialty pumpkins and gourds, hay rides, maze-master trivia and smartphone maze games. SAVE THE DATE: Haunted Night Maze, Oct. 31 from dusk to 10 p.m. supporting THS 2015 SAFE Party.