What makes the race so interesting is that Baldwin Street is officially recognized by the Guinness Book of Records as the steepest street in the world (gradient of 1:2.86, a 19-degree slope)
We're not sure exactly what the Jaffa race rules are, but we understand there are 3 races in which 25,000 numbered Jaffas per race are released. Attendees are asked to "sponsor" a Jaffa for $1.00 and we assume the first Jaffa to get to the bottom of Baldwin street wins. More importantly however, since the first race was held in 2001, this event has raised over $600,000 for local charities.
Baldwin Street is also a popular place throughout the year for taking photos (many based on optical illusions) as these examples show.
Dunedin is included on many of the NewZealandVacations.com itineraries, including this favorite, the 12 Day The Heart of New Zealand Self Drive