...Wandering Home Adventures... Become a Peoria County Thru-Adventurer! The term ‘thru-hiker’ identifies individuals hiking the entire length of a long trail like the Appalachian Trail or Ice Age Trail. National Parks have the National Park Passport where people can document their travels to each park. Let’s give these a Heartland twist. Try experiencing every outdoor area in Peoria County and become a Peoria County Thru-Adventurer! Get your Peoria County checklist by clicking here.