The Celtic Challenge is a cross-border women's rugby union competition that will be held annually, launched in 2023. Designed to develop players for the Celtic nations of Ireland, Scotland and Wales, the inaugural pilot edition featured a double round robin between three teams, one from each participating union. From 2024 the competition will involve six teams, two from each participating union.[1][2] Beginning with the 2024–25 season, the competition will maintain its six-team setup, transitioning into a full home-and-away round-robin format. The winners will be determined by standings at the end of the season.[3]
The three participating unions fund the competition, with further development funding from World Rugby.
A total of nine clubs have been involved in since the league's inception in the 2023 season. Below, the 2023–24 clubs are listed along with the number of full seasons they've competed in. Current clubs are shown in bold. The seasons each club has participated in, including the present one, are displayed in the last column.
First match(es) will be played: Unknown. Source: [4] Rules for classification: 1) competition points; 2) match points difference; 3) match points for (C) Champion