High Force

High Force is a waterfall on the River Tees, near Middleton-in-Teesdale, Teesdale, England. The waterfall is within the North Pennines Area of Outstanding Natural Beauty and the European Geopark. The waterfall is part of the historic county boundary between the North Riding of Yorkshire on the south bank, and County Durham on the north bank.

The whole of the River Tees plunges 70 feet over a precipice in two stages. After heavy rainfall the river will also flow over the usually dry right hand side channel, creating two falls. Very occasionally the river level will be high enough to flow over the central section of rock; the last recorded time this happened was in December 2015 after Storm Desmond.