Bondi Beach is about 1 kilometre (0.62 mi) long and receives many visitors throughout the year. Surf Life Saving Australia has given different hazard ratings to Bondi Beach in 2004. While the northern end has been rated a gentle 4 (with 10 as the most hazardous), the southern side is rated as a 7 due to a famous rip current known as the "Backpackers' Express" because of its proximity to the bus stop, and the unwillingness of tourists to walk the length of the beach to safer swimming. The south end of the beach is generally reserved for surfboard riding. Yellow and red flags define safe swimming areas, and visitors are advised to swim between them.[13]