The marathon will be flagged off from Dharampura, Jama Masjid Gate no 7, at 10 am on Sunday.
It will cover Old Delhi areas including Dariba, Fountain Chowk, Town Hall, Fatehpuri and Khari Baoli Chowk, said BJP leader and president of the Foundation, Vijay Goel.
The Old Delhi area of Shahjahanabad has nearly 525 havelis that were constructed in the 19th and 20th century. These havelis, having Hindu, Mughal, British and European art influences, are in a pathetic condition, Goel said.
The event titled 'Save Heritage-Save Chandni Chowk' is expected to be attended by Union Minister Jitendra Singh and other dignitaries, he added.