The state highway follows the Tye River through Massies Mill to Roseland, where the highway turns south to join SR 151 on Patrick Henry Highway. The two highways run through the hamlet of Hendersons Store to just north of Piney River, where the highways diverge at a wye intersection; the short connecter between SR 151 south and SR 56 east is SR 151Y.
The state highway follows the Tye River from Massies Mill to Roseland, then turns south to join SR 151 on Patrick Henry Highway. The two highways pass through Hendersons Store before diverging at a junction near Piney River, where a short connector road connects SR 151 south to SR 56 east is designated as SR 151Y.