The Calfkiller River is a tributary of the Caney Fork River located in Tennessee, USA. It flows through Putnam County and is known for its clear waters and scenic surroundings. The river is approximately 30 miles long and provides a habitat for various fish species, making it a popular spot for fishing and recreational activities. The river's name is believed to originate from early settlers who used the area for cattle grazing. The Calfkiller River eventually joins the Caney Fork River, which is part of the larger Cumberland River watershed. This region is significant for its natural beauty and outdoor opportunities.