There’s also the Dover TT course in Dover, MA: Dover Time Trial (Official) | Strava Ride Segment in Dover, MA
The course has three right turns. One is at a traffic light, and the other two don’t have stop signs. Downside is you would need to do 3+ loops to get to 40k. But close to Boston!
Hill climb series in New England and NY.
Slightly outdated link: http://www.nebc.us/services-view/bumps-series-2020/ and there is a FB page.
MT Greylock, Washington, Wachusett and others. There are a few more longer hill climb events down in Mid-Atlantic.
With Covid of course it’s not clear what will happen to these events in 2021 and many did not run in 2020. But good history so most should come back.
I lived in Gloucester for a while there… it is a super nice jaunt around the cape!