MD 329 begins at an intersection with MD 33 (St. Michaels Road) just west of the village of Newcomb. The two-lane undivided state highway heads south, skirting the southern edge of the community. MD 329 enters the community of Royal Oak, where the highway passes around a branch of Oak Creek and curves to the east.
MD 329 originates at an intersection with MD 33 (St. Michaels Road) near Newcomb village. The two-lane road then heads south, adjacent to the southern boundary of the community. As it enters Royal Oak, the highway navigates around a creek branch and turns towards the east.