The Monarch High School (MHS) is a secondary school located in Louisville, Colorado, and is part of the Boulder Valley School District. The school was named a John Irwin School of Excellence for the 2004-2005 school year. In 2007, Monarch was named the Sixth Best High School in the Denver Metro Area by 5280 Magazine. As of 2015, Newsweek magazine ranked the high school 356th in the US, out of the top 500.