'Delhi, The capital and the heart of India presents a wide range of marathons. Airtel Delhi Half Marathon is held annually presenting these race categories: Half Marathon Elite, Half Marathon, Open 10K Run, Great Delhi Run, Senior Citizen’s Run, and Champions with Disability. Then comes the IDBI Federal Life Insurance New Delhi Marathon. Race categories include Full Marathon, Half-Marathon, 10K and 5K. Delhi has some very popular heritage sites like Qutub Minar, Jama Masjid, Red Fort etc. Trying the street food of Chandni Chowk is a must.