Rotterdam leads the World's Fastest Marathon Courses based on finishing-time averages

Ranking of World's fastest Marathon Courses based on averages of top 10 finishing times as of Boston Marathon 2011 April 18
Source : ABN AMRO Marathon Rotterdam

1) Rotterdam --- 2:05:06.6
2) Berlin --------- 2:05:09.6
3) London ------- 2:05:21.5
4) Boston -------- 2:05:36.4
5) Chicago ------- 2:06:02.5
6) Amsterdam - 2:06:25.3
7) Paris ----------- 2:06:28.6
8) Fukuoka ----- 2:06:47.5
9) Frankfurt ---- 2:06:53.5
10) Dubai -------- 2:07:04.5