An object retention system which aids in safely and efficiently securing ornamental objects such as lights across a structure such as a roof. The object retention system generally includes a retainer rail adapted to be secured to a structure such as a gutter or roof gable. The retainer rail includes a receiver rail having a plurality of receivers adapted to removably retain one or more retainers therein. Each of the retainers is adapted to secure an object such as a decorative light against the retainer rail. The retainer rail includes a channel for aiding in securing to a gutter and a barbed portion for aiding in securing to other structures, such as between roof shingles and flashing. A connector is provided for seamlessly interconnecting multiple retainer rails to each other across a structure.