Union County Speedway hosts the motorsports that first took place in Australia in what year?
Union County Speedway:  UCS is also host to dirtbike, quad, Mini-Sprint, and Demolition Derbies. Demolition derby: Demolition derby is a motorsport usually presented at county fairs and festivals. Demolition derby:  For example, Australia's first demolition derby took place in January 1963.
1963