Torch Lake is a lake covering about 2,700 acres (11 square kilometers) and is mostly located in Torch Lake Township, with parts in Osceola and Schoolcraft townships in Houghton County, Michigan. The lake is supplied by the Traprock River.

The village of Lake Linden, at the northern end of the lake, once had the largest copper mill in North America. Around 200 million tons of copper mill waste were dumped directly into Torch Lake, filling about 20% of the lake’s volume. The Environmental Protection Agency estimates that contaminated sediments in some areas are 70 feet (21 meters) thick, and surface sediments contain up to 2,000 parts per million (ppm) of copper.

Torch Lake is about five miles (8 kilometers) east-northeast of Houghton and is approximately six miles (9.7 kilometers) long and 1.5 miles (2.4 kilometers) wide. Its total surface area is 2,659 acres (11 square kilometers), and its deepest point is 120 feet (37 meters). A channel flows from the lake south into Torch Bay, which connects to Portage Lake.