Challenge Cup holders St Helens will begin the defence of their title away at Championship side Whitehaven.
Saints, who beat Castleford Tigers in last year's final at Wembley, will travel to Haven, after they beat York City Knights in the previous round, in one of the standout ties of the sixth round.
Castleford have a tasty draw themselves, St Helens begin Challenge Cup defence at Whitehaven as sixth-round draw made
Challenge Cup holders St Helens will begin the defence of their title away at Championship side Whitehaven.
Saints, who beat Castleford Tigers in last year's final at Wembley, will travel to Haven, after they beat York City Knights in the previous round, in one of the standout ties of the sixth round.
Castleford have a tasty draw themselves, 
