SH 56 begins at an intersection with US 82 just outside of Whitesboro. The highway then enters Whitesboro with indirect access to US 377. SH 56 next travels through Southmayd, where it meets SH 289, before entering Sherman.
SH 56 commences at an intersection with US 82 just outside of Whitesboro. The highway thereafter enters Whitesboro via indirect access to US 377. SH 56 subsequently traverses Southmayd, where it intersects with SH 289, before entering Sherman.