Mad Mouse, Steel roller coaster in Shakopee, Minnesota, US

Mad Mouse is a steel roller coaster at Valleyfair that moves through tight turns and sudden directional changes with sharp lateral movements. The ride uses individual cars that navigate a compact track layout designed to maximize thrills in a smaller footprint.

The ride was installed at Valleyfair in 1999, replacing an earlier coaster called Rails that had operated in the park. This addition reflected the park's investment in refreshing its attraction lineup with contemporary ride technology.

The Mad Mouse represents a modern interpretation of traditional wild mouse coasters, featuring tight turns and sudden drops that create lateral forces.

The park tends to have shorter wait times on weekdays and outside peak seasons, making these better times to experience the ride. Comfortable footwear is recommended since exploring the park involves considerable walking between attractions.

Ride Centerline designed the track and supports, not the cars. The ride opened on May 8, 1999, taking the place of the earlier coaster Rails, which was moved to Jolly Roger Amusement Park in Maryland in 1998. The manufacturer was Arrow Dynamics.