The Challenge Stakes is a Group 3 flat horse race in Ireland open to fillies and mares aged three years or older.
It is run at Leopardstown over a distance of 1 mile and 6 furlongs (2,816 metres), and it is scheduled to take place each year in July.
The race was first run in 1991 and was restricted to fillies and mares from 2016.
[1] Since 2016 the race has been run as the Stanerra Stakes.
In 2018 it was upgraded from Listed to Group 3 status as part of changes to enhance the European programme of stayer's races.