The Mount was a football stadium in Catford, located in the south west corner of what later became Mountsfield Park.

(founded c1900) used this as their home ground and eventually developed the land into a proper stadium with terracing, and it also hosted Charlton Athletic games in the 1923–1924 season.

Then a London League side, Catford Southend used the ground from about 1909 until the start of World War I in 1914,[2] and then after the war[3] (the 1914 Ordnance Survey map shows the ground situated parallel to Laleham Road with its southern end just north of housing on Brownhill Road).

Several of the members had previously opposed the club's professionalisation and its and entry into the Football League, and protested against the relocation.

The board of directors did not believe The Valley would bring in enough regular support to make the club financially viable.

The merger came to a halt when the Football League refused to permit a name change if the club were to continue playing in the Third Division South (as Charlton wished).