Forest Lake is a city in Washington County, Minnesota, United States. The population was 18,375 at the 2010 census. It is located on one of Minnesota's 100 largest lakes. The lake serves as the source of the Sunrise River.Interstate 35 and U.S. Highways 8 and 61 are three of the main routes in the community.Other main routes include County Road 2–Broadway Avenue. Interstate 35 splits into Interstate Highways 35E and 35W just south of Forest Lake in the nearby city of Columbus. The junction is commonly referred to as the Forest Lake Split. The Forest Lake Split was the scene of the August 11, 2003 death of Herb Brooks, coach of the gold medal-winning 1980 U.S. Olympic Hockey Team (Miracle on Ice).HistoryForest Lake began as a stop for the St. Paul and Duluth Railroad. The first train reached Forest Lake on December 23, 1868. The lake was so named for the abundant timber that lines its shores. Forest Lake Township was organized on March 11, 1874; The first one-room school was built that same year, which stood at the present day location of city hall. The city of Forest Lake was incorporated on July 11, 1893 with 175 residents. In 2001, the city annexed the surrounding former Forest Lake Township.Forest Lake was known as one of the major summer resort areas of the upper Midwest in the late 1800s/early 1900s. The village had numerous hotels, including the Marsh Hotel, on North Shore Drive, which was host to U.S. President Grover Cleveland and future U.S. President William McKinley, as well as many world dignitaries. The steamship Germania sailed the Forest Lake chain of lakes in the late 1800s, and was a major tourist draw.