The Red Mile is the name given to a stretch of 17 Avenue SW in Calgary, Alberta, Canada during the Calgary Flames 2004 Stanley Cup playoff run, which ended with a loss to the Tampa Bay Lightning in seven games in the finals. It gained worldwide notoriety both for the relative lack of violence while upwards of 55,000 fans celebrated their team's success. The 'Red' originates from the home team colour of the Calgary Flames' jerseys, red, similarly characterized by the 'Sea of Red' seen at many home games in the Saddledome; 'Sea of Red' and 'C of Red' is a play on words.

The 2003–04 Calgary Flames season was the 24th National Hockey League season in Calgary, and the 32nd for the franchise in the NHL. The Flames ended a seven-year playoff drought, qualifying for the post-season for the first time since 1996. The Flames defeated three division winners en route to an appearance in the 2004 Stanley Cup Finals. The Flames were defeated in the finals by the Tampa Bay Lightning in seven games. The run to the finals captured the imagination of the city, while the Red Mile celebrations gained international attention for the "Mardi Gras-like" atmosphere as up to 80,000 people celebrated in the streets after each playoff game.