Registrations for the national level event, which offers a prize purse of Rs 20 lakh for the various categories, will close on Oct 18.

The men’s full marathon will see the return of defending champion Elam Singh from ASI, Pune, who will have to fend off challenges from the likes of Lyngkhoi Bining, Sanaton Singh, K C Ramu, Budha Ram and Angad Kumar.