Castelletto Circuit, officially known as the 7 Laghi Kart, is a motorsport facility located in Castelletto di Branduzzo, Lombardy, Italy, primarily known for karting but also hosting other forms of racing. Originally a modest karting track, it has evolved into a comprehensive complex boasting multiple track configurations and modern amenities.

The primary track layout is a technical and challenging circuit stretching approximately 1.256 kilometers (0.78 miles). It features a mix of fast straights, sweeping curves, and tight hairpin turns, demanding precision and agility from drivers. The track surface is generally considered to be high-grip, contributing to quick lap times and exciting racing. A key characteristic is its undulating terrain, with noticeable elevation changes that add to the circuit's complexity and visual appeal. The circuit is designed to promote overtaking opportunities, particularly at the end of the main straight and into the tighter corners.

While karting remains its core activity, Castelletto Circuit also hosts races for smaller formula cars, touring cars, and motorcycle events. The facility is equipped with a modern timing system, race control, pit garages, and spectator areas, catering to both amateur and professional racing series. The circuit's versatility makes it a popular choice for testing, driver training, and corporate events. Its location in the scenic Lombardy region, coupled with its modern facilities, provides a unique and enjoyable experience for competitors and spectators alike.

What sets Castelletto apart is its commitment to karting excellence and its ability to adapt to different racing disciplines. The meticulous track maintenance, high-quality facilities, and challenging layout make it a favorite among karters, while its suitability for other racing formats ensures its continued relevance in the Italian motorsport landscape.