Faizaan. we recently polled members of delhirunners.com on their favorite running routes. Here's the result of that poll. Incidentally, a lot of these routes are in Central or South Delhi, not too far from where you stay. So, you might want to check them out. I particularly like the Nehru Park, Deer Park, Lodi Gardens and the Jahanpanah Forest routes.

1. 
   
2. Nehru Park - 9 votes
   
3. Lodi Gardens - 7votes
   
4. Deer Park - 4votes
   
5. India Gate - 3votes
   
6. Jahanpanah City Forest - 3votes
   
7. Japanese Park, Rohini - 3votes
   
8. Leisure Valley, Gurgaon - 3votes
   
9. Delhi University - 1votes
   
10. Jawaharlal Nehru University - 1votes
    
11. Khan Market - 1votes
    
12. Jor bagh, Lodi Colony - 1votes
    
13. Sector-93, Noida - 1votes
    
14. Central Ridge Reserve Forest - 1votes
    
15. Sanjay Lake Park - 1votes
    
16. Greater Noida - 1votes
    
17. Raj Ghat - 1votes
    
18. District Park, Pitampura - 1votes
    
19. Shalimar Bagh - 1votes
    
20. Asola Wildlife Sanctuary - 1votes
    
21. Gautam Buddha Park, Noida - 1votes
    

Check more details on the poll here:

http://www.runinfinity.com/2009/09/top-20-running-routes-in-delhi-ncr.html

-Tanvir