Lone Tree Cemetery is a Commonwealth War Graves Commission (CWGC) burial ground for the dead of the First World War located in the Ypres Salient on the Western Front in Belgium.

[1] Most of the burials are of men from the Royal Irish Rifles 36th (Ulster) Division[2] who died on the first day of the battle.

Some of the men buried here were actually killed by the explosion of the mine placed by the British Royal Engineers under Lone Tree hill[4] at Spanbroekmolen, which was blown around 15 seconds later than planned.

[5] The crater at Lone Tree was acquired in 1929 by the Toc H foundation in Poperinge, today recognised as the Pool of Peace memorial.

[2] The cemetery grounds were assigned to the United Kingdom in perpetuity by King Albert I of Belgium in recognition of the sacrifices made by the British Empire in the defence and liberation of Belgium during the war.