The Cleveland Hills are a range of hills on the north-west edge of the North York Moors in North Yorkshire, England, overlooking Cleveland and Teesside. They lie entirely within the boundaries of the North York Moors National Park. Part of the 110-mile (177 km) long Cleveland Way National Trail runs along the hills, and they are also crossed by a section of Wainwright's Coast to Coast Walk. The hills, which rise abruptly from the flat Tees Valley to the north, include distinctive landmarks such as the cone-shaped peak of Roseberry Topping, near the village of Great Ayton – childhood home of Captain James Cook.

Bolckow, Vaughan & Co., Ltd was an English ironmaking and mining company founded in 1864, based on the partnership since 1840 of its two founders, Henry Bolckow and John Vaughan. The firm drove the dramatic growth of Middlesbrough and the production of coal and iron in the north-east of England in the 19th century. The two founding partners had an exceptionally close working relationship which lasted until Vaughan's death.