[rmason]

Here is a way to find hamfests:

https://www.arrl.org/hamfests-and-conventions-calendar

Note I have found searching by city and state is broken. You need to search by zipcode.

[abrugsch]

Unfortunately I'm not only not in the BOS area, I'm not even in the US anymore. Though the RSGB probably has a similar listing... If I get my license I might even find out directly :)