The Nilgai City Trail is a 35km loop that connects the entire forest belt that lies at the southern boundary of New Delhi. The loop is a mix of trails and roads, with a total of over 70% of the route on wild rocky, dusty, thorny jungle trails. The Nilgai City Trail is also a historical route as it goes through forests, forts and establishments that date back to the periods between the 8th and the 14th centuries AD and form 4 of the 7 historical 'cities of Delhi'.

The route goes through the following key forests and areas: