Moreover, bike messengers and other urban riders may ride fixed gear bicycles in alleycat races, which are normally held in city streets, including New York City's famous fixed-gear-only race Monstertrack alleycat. Similarly, Wolfpack Hustle began in 2005 simply as ride bringing together fast-paced bicycle riders with the common love for riding and has expanded to an internationally known race series that takes place in Los Angeles, California. The group has managed to receive sponsorships from several well-known companies including Castelli, which is an over-130-year-old Italian cycling clothing brand, helping spread interest and knowledge about the group and the races they hold. In San Francisco, California, Red Bull holds Red Bull Ride + Style events, which bring together both track and freestyle fixed-gear riders from around the world for competitions.