Forest Lake is a city in Washington County, Minnesota, United States. The population was 18,375 at the 2010 census. It is located on Minnesota's 94th largest lake (not including Lake Superior). Interstate 35 and U.S. Routes 8 and 61 are three of the main arterial routes in the city. The separation of highways 35W and 35E (from Interstate 35), just south of Forest Lake, is commonly called 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).