The William Ryan Trophy is a Canadian ice hockey series to determine the Northwestern Ontario seed of the Keystone Cup - the Western Canada Junior "B" Hockey championship.
Hockey Northwestern Ontario sanctioned league winners play-off for the trophy.
From 1997 until 2004, the right to compete in the Keystone Cup was an epic battle between the champions of the Thunder Bay Junior B Hockey League and the North of Superior Junior B Hockey League.
As the NSHL folded in 2004, the TBJBHL won the eight-year series five championships to three.
The only time the Northwestern Ontario champion has ever won the Western Canadian title was in 1999 when the Fort William Hurricanes went the distance.