The first edition of the New Delhi Marathon special event, the 12 Hour stadium run was held at the Jawaharlal Nehru Stadium on 27th Dec 2015. This was a special event in the build-up to the main event which is slated for 28th Feb 2016.
Supporting the Swacch Bharat campaign, this event aims at creating awareness about this campaign. It was a resounding success, with over 25 participants in the 12 Hour Stadium Run category including celebrity runner Milind Soman and one female contestant, Shibani Garat. Each participant ran around the 400mtr track for the entire period of time.
A running event with a distance greater than 42.2 km is known as an ultra. This event follows an international format and has been introduced with a vision of popularising running within the community, and managed to do exactly that when the ultrarunners inspired the spectators to join the run for a few laps on their own.
Winners for the Individual Ultra Stadium Run:
| Name | No. of laps | Distance (in km) | |
| Winner | Srinivas Venigalla | 272 | 108.8 |
| First runner-up | Arun Bhaardwaaj | 265 | 106 |
| Second runner-up | Narendar Ram | 250 | 100 |
The Stadium Run Team Relay saw over 18 teams participate through the day wth 6 members each running for a block of 2 hours.
This event was also a resounding success with runners coming out in the wee hours of the morning and then bearing the harsh conditions through the day until late evening when the run completed. Celebrity runner and actor, Milind Soman, Adidas Brand Managar Abhinav Sharma and Race Director Nagaraj Adiga felicitated all the winners. The team relay contestants clocked in some serious miles:
| Name | No. of laps | Distance | |
| Winner | Adidas Wolfpack | 362 | 144.8 |
| First runner-up | Elite Running Academy | 351 | 140.4 |
| Second runner-up | DRG – Buddies | 329 | 131.6 |
Race Director Nagaraj Adiga said following the event, “The runners of Delhi have been incredible. They have been out on the track through the day and the response to this event has been phenomenal. We have had spectators come in through the day with a lot of them getting inspired and jumping on the track to do a few laps.
“I introduced this event to inspire everyday people to get out of their comfort zone. These ultra runners managed to do exactly that by inspiring many people to start their journey into fitness.”
