The Newmarket Canal, officially known but rarely referred to as the Holland River Division, is an abandoned barge canal project in Newmarket, Ontario. With a total length of about 10 miles (16 km), it was supposed to connect the town to the Trent–Severn Waterway via the East Holland River and Lake Simcoe. Construction was almost complete when work was abandoned, and the three completed pound Locks, a swing bridge and a turning basin remain largely intact to this day.