The Sydney Trail Series Spring is a three-race trail running series held at St Ives Showground on Mona Vale Road in St Ives, on Sydney’s North Shore. Races occur monthly through spring, with each event offering runners a choice of distances rather than a single fixed course.
The standard options include a 7 km short course, a 10.5 km medium course, and a 24 km long course. A 30 km extra-long course is added for the final event. The series has been held annually since 2012. Entries can be purchased for individual races or as multi-race bundles categorized by distance.