Ohio Central Basin Steelheaders - Monthly Event Calendar Ashtabula River Clean Up 8:00 am – 1:00 pm Cederquest ParkHarmon Hill RoadAshtabula, Ohio Map Cederquest Park 2nd Annual Ashtabula River Clean Up: OCBS and the Ashtabula Soil and Water Conservation District is teaming up to pick up trash along the lower Ashtabula River. More information about Ashtabula River Clean Up