Deer Creek State Park lies on the eastern edge of the great till plains of Ohio. These plains receive their name from the glacial debris, or till, which is a mixture of sand, silt and gravel that was deposited by the glaciers. As glaciers advanced across the northern 2/3 of Ohio, most hills and valleys were covered and filled in by the till, leaving this part of Ohio relatively flat. Today, these rich plains in the park's region support corn, soybeans and wheat. The first settlers to the area did not find these open fields. Except for a few small prairie openings, the region was covered by dense woodlands. A regrowth of the original woodlands can be found scattered along the ridge tops and creek bottoms of the park.

Wildflowers abound in the fields and woodlands of the till plains. In spring, common flowers are Dutchman's breeches, rue anemone, trillium, spring beauty and bloodroot; in summer months: thimbleweed, wild lettuce, jewelweed and daisy fleabane; in autumn: aster, goldenrod and chicory. 7 miles of hiking trails and a fitness trail near the lodge take the visitor through meadows and scattered woodlands. 14 miles of bridle trails accommodate riders with their own horses.

• Go for a hike and look out for the abundance of wildlife: The best known animals of the Deer Creek area include the chorus frog, painted turtles, black rat snake, red fox, eastern meadowlark, song sparrow, cowbird, eastern bluebird, barn swallow and woodcock.