ATB (Aravali Trail Blazers) proudly presents Trail-A-Thon on the first Sunday of Feb every year. Trail-A-Thon continues to be an ITRA Certified event and is a challenging Ultra Trail running event being organised in the tricky, thorny and rocky terrains of Aravali range, Gurgaon in the vicinity of Delhi & Faridabad. The trail is known as Manger Trail connecting Damdama Lake at the other end.