A cable routing system formed from a tray with a plurality of transverse wires and a plurality of longitudinal wires. The transverse wires form a generally flat top portion with downwardly extending sidewalls. The longitudinal wires are positioned underneath the top portion, side longitudinal wires are positioned adjacent the downwardly extending sidewalls and bottom longitudinal wires are positioned at an end of each of the downwardly extending sidewalls. The transverse wires and the longitudinal wires form a grid with a plurality of openings for routing a plurality of cables. The cable routing system also includes a sidewall removablely secured to the tray to retain cables routed thereon and a corner radius device removablely secured to the tray to provide bend radius control to cables routed along intersecting cable trays.