Are you planning your 2011 running schedule with the intention of running a Boston qualifying time? If so, the following list of most popular Boston qualifying marathons may be helpful.
My first attempt at a Boston qualifier in 2011 will be the Ottawa Marathon in May. While it does not appear on the list of marathons with the highest percentage of Boston qualifiers in 2010, it did have the 12th highest number of Boston qualifiers.
I have not yet considered a second marathon for next year but I will keep the list in mind if Ottawa does not go as planned as there are a few fall marathons on the list that are relatively close to Ottawa.