Apishapa River is a 139mi tributary of the Arkansas River that flows from a source near West Spanish Peak in southern Colorado. It joins the Arkansas east of Fowler, Colorado. A U.S. Geological Survey (USGS) station, #07119500, located along this river near Fowler measures the river's discharge.The water level and salinity of the Apishapa River is monitored by gaging stations installed at three locations along the headwaters of the river in 2007.