Featherstone Castle, a Grade I listed building, is a large Gothic style country mansion situated on the bank of the River South Tyne about 3 miles (5 km) southwest of the town of Haltwhistle in Northumberland, England.

[2] Lord Wallace bequeathed the estate to his nephew Colonel James Hope (1807–1854), (son of the Earl of Hopetoun), who changed his name to Hope-Wallace.

The various alterations to the structure have resulted in a large castellated and complex country house, rectangular in form with a central courtyard and towers at each angle.

In 1825, farmers working on the lands at Wydon Eals near Featherstone Castle discovered what was thought at first to be a buried oak tree trunk.

In 1961 the school moved to new premises at Ridley Hall, Northumberland, and Featherstone Castle was converted to a residential conference and activity centre for young people and students.