Generally, the male crawls alongside and over the female, making rhythmic motions with his body. Just before copulation, the male may grasp the female's head or neck in his mouth. Sometimes, copulation can become quite violent, both snakes wrapping about each other. Copulation may take from several minutes to hours. After mating, the pair splits up and the male will wander about the prairie in search of food.
Males have much larger home ranges than females.
Bullsnakes are oviparous and lay about a dozen eggs in the sand or other protected areas where they can incubate without the aid of the female. Late June and into July are common egg laying months. I find the highest number of gravid bullsnakes around early June in Linn County. The eggs will hatch in August or September. Bullsnakes, like most snakes, have varied ways of reacting to humans in the wild.