From ema.arrl.org:
Volunteer registration has been open for the Marathon since Wednesday June 16, 2021 at 10:00 AM and the Amateur Radio volunteer registration deadline has been extended to Friday July 30th, 2021 at 500 PM EDT. The race itself is taking place on Monday, October 11, 2021.
For Returning Volunteers:
The BAA sends out an email which provides you with a direct link once registration is open. This email will also include your loyalty number, which is required for sign up. New for this year is that returning volunteers will need to setup an account via the BAA Athlete’s Village.
For New Volunteers:
If you haven’t previously volunteered, or have a friend who would like to volunteer, please go directly to the Volunteer Registration page and follow the instructions for new volunteers which will include setup of an account via the BAA Athlete’s Village.
Don’t delay! Volunteer registration has been extended and closes on Friday July 30th, 2021 at 5:00 p.m. Help us get the word out by forwarding this message to your club and other amateur radio operators who wish to volunteer. Most volunteers first learn about the event through word of mouth. If you know new licensees who might like to join us, please make sure to let them know about it. Even just a quick mention at your club meeting can be a big help.
We look forward to seeing everyone again soon.
Thank you, and 73,
Boston Marathon Communications Committee
contact@hamradioboston.org