The Mousetrap is an informal name for the interchange of Interstate 25 and Interstate 70 in the northern part of Denver, Colorado, United States. The interchange pre-dates the Interstate Highway system, originally built as an intersection between two local roads in 1951. The interchange was completely rebuilt, starting in 1987. The re-design was prompted from an incident where a U.S. Navy truck hauling torpedoes overturned, causing panic and major disruptions in the city.