Lokesh Ohri is an Indian anthropologist, historian, writer and a cultural activist based in Dehradun, Uttarakhand, who has campaigned for the preservation of the natural and cultural heritage of the Doon Valley.

[2] Ohri was born in Dehradun and attended St Joseph's Academy and has a master's degree in sociology.

[3] Ohri has long campaigned against insensitive and rapid development in Uttarakhand, particularly in the state capital Dehradun, which has led to a reduction in green cover of the state, partial or complete loss of heritage canals and water bodies through pollution or road construction, and poor restoration work on historic monuments.

[5][6] Lokesh established the Dehradun based community called Been There Doon That.

Today, BTDT, as it is popularly called, is home to a huge community of citizens sensitised to the cause of heritage.