Trail-a-thon is probably the biggest and the most well known trail run in the country. It is organized by Aravali Trail Blazers, a group born out of love for running by the Delhi NCR Running Community. It is organized in a 28 kms loop in the Aravalis with distances of 7,14,28 and 56kms and a Nature Walk for families and nature lovers where knowledge on Aravalis and their importance will be imparted by experts. The run is ITRA recognized and fully supported and can be aptly titled a ‘Luxury Trail Run’.