What is the greatest marathon in the world named?

The top ten Marathons of the world are listed here:

1. London Marathon, April

2. Berlin Marathon, September

3. New York City Marathon, November

4. Chicago Marathon, October

5. Boston Marathon, April

6. Stockholm Marathon, June

7. Rotterdam Marathon, April

8. Paris Marathon, April

9. Honolulu Marathon, December

10. Amsterdam Marathon, October

Hope it helped!