Donna's Corn Maze Presents: Muddy Corn Dawgs 5K Obstacle Course. This is a Superior Course with over 300 acres of private land that includes obstacles like no other in the Valley. Obstacles include but are not limited to HUGE Monster Tires, Mud pits, shallow and deep drainage ditches wet and dry, caterpillar ditch run, thorny thicket, cactus run, just to name a few with more being included!