The 2025 season was the Castleford Tigers' 100th season in the Rugby Football League and their 18th consecutive season in the top flight of English rugby league. The club competed in the 2025 Super League and the 2025 Challenge Cup.
Castleford began the season under new head coach Danny McGuire before he was dismissed in July, with director of rugby Chris Chester taking charge as caretaker. The team was captained initially by Sam Wood, then by Alex Mellor from May. They finished the Super League season in 11th place.
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Castleford announced pre-season fixtures against Sheffield Eagles, Wakefield Trinity and Hull FC, with each serving as a testimonial match for Quentin Laulu-Togaga'e, Luke Gale and Joe Westerman respectively. In January, the squad headed for a week-long training camp in Spain, which included a reduced-contact exhibition match against local club Valencia Huracanes in Tavernes de la Valldigna on 18 January. Played across four 20-minute quarters, the game saw some Castleford players swapping sides to supplement the Valencia team, while one travelling fan won the opportunity to play for the Tigers. Castleford won the match 50âÂÂ8.
On 20 November 2024, Super League teams revealed their schedules for the opening two matches as well as Rivals Round. On 21 November, the full Super League fixture list was announced. As determined by 2024 league positions, Castleford's five loop fixtures were against Salford and Leeds at home, Hull KR and St Helens away, and Wakefield at the Magic Weekend.
Under the new competition format, Castleford entered the 2025 Challenge Cup in the Third Round, scheduled to be played in early February prior to the start of the Super League season. As a top flight club, they were guaranteed an away tie against non-Super League opposition. In the Third Round draw on 14 January, Castleford were selected to face the winners of the Second Round tie between Bradford Bulls and Doncaster. Bradford progressed to face Castleford, with the match being chosen for broadcast by the BBC.