Following the formation of British Amateur Rugby League Association in 1973, local District Leagues got together and pooled their resources. The Yorkshire league was formed by a merger of Castleford, Heavy Woollen, Leeds, Wakefield and York districts. There was also a West Yorkshire Sunday league formed by Castleford, Doncaster, Heavy Woollen and Leeds districts. This league became the Yorkshire Sunday League in 1994-95 before going defunct after 1995-96.
In 2012 the CMS Yorkshire league folded and all remaining teams were accepted by the Pennine League.