The Connoquenessing Creek is a tributary of the Beaver River, approximately 50 mi (80 km) long. It rises in eastern Butler County and flows southwest, through the Lake Oneida reservoir and past Butler, then WNW in a meandering course past Eidenau where Breakneck Creek is received, and then continuing past Harmony and Zelienople. It receives Slippery Rock Creek from the northwest near Ellwood City, then joins the Beaver west of Ellwood City, approximately 3 mi (5 km) further downstream.
There are many things to do on "The Connie", you can fish, kayak or canoe. Though we do not recommend swimming in it as the creek was highly polluted at one point. However, since all the steel plants closed upstream plus local efforts to clean it, this wonderful waterway is recovering nicely.