Tuttle Creek State Park will host an open house Saturday. A guided nature hike, a Zombie 5K, archery, slingshot, crossbow shooting and tomahawk throwing are some of the activities scheduled throughout the day. The park office is open from 8 a.m. to 4:30 p.m. Giveaways will be available. Park entrance is free that day and all activities are free except the 5K. Call 785-539-7941 for more information.