It opened in 1905 and has since been greatly enlarged, incorporating a former football ground, The Mount, and adjacent allotments and playing fields.

The core area of the park was originally part of Mountsfield, a substantial house and grounds, built in 1845 for the noted microlepidopterist and entomologist Henry Tibbats Stainton by his father as a wedding gift.

[2] The southwestern corner of the current park was previously a football ground used by London League side Catford Southend F.C.

[4] Around this time, a new landlord, Harry Isaacs, took over the Dartmouth Arms on the corner of Laleham and Ringstead Roads.

[2] Catford Southend continued to play at The Mount briefly but the ground was closed in January 1927,[2] and was absorbed into the wider Mountsfield Park.