A waterfall-type cable router for routing cables out of cable trays includes a curved ramp having a front portion and a rear portion, a vertical left curved wall transitioning into the curved ramp and extending the length of the left side of the curved ramp, and a vertical right curved wall transitioning into the curved ramp and extending the length of the right side of the curved ramp. A first portion of each of the left and right curved walls includes a slot extending upward from the lower edge of the first portion into the curved wall, the slot being configured to attach the cable router to a cable tray.