KY 429 begins at an intersection with KY 55 (North Spalding Avenue) in the north-central part of Lebanon, within the central part of Marion County. It travels to the northwest and leaves the city limits of Lebanon. It intersects KY 2154 (Veterans Memorial Highway). It travels along the southwestern edge of Rosewood Golf & Country Club. The highway curves to the north-northwest. It crosses over Shepherds Run Branch and Shepherds Run twice. The second crossing of Shepherds Run marks the Washington County line.[1] KY 429 heads to the north-northeast and parallels the creek. It curves to the north-northwest and crosses over the creek again. It curves to the north-northeast and begins paralleling Cartwright Creek. It then enters Cisselville, where it meets its northern terminus, an intersection with KY 152 (Loretto Road).[2]