Abstract: A launcher for a zipline trolley system comprises a body, first and second arms, first and second connectors, first and second pads, and an actuating portion. The first and second arms extend from the body. The first and second connectors are pivotably connected to the first and second arms, respectively. The first and second pads are connected to the first and second connectors, respectively. The actuating portion comprises a sliding member and first and second pull arms. The first and second pull arms are connected to the first and second connectors, respectively. When the launcher is in a first configuration, the first and second pads are adapted to hold the trolley in place. Movement of the sliding member away from the body causes pivotable movement of the first and second connectors and a transition of the launcher to a second configuration to release the trolley.