https://www.hillclimbworlds.com/
then 2 days later is the Cookie Fondo, Obviously it is not a race but it is a hard ride. and if you do the Shorter 85mile ride, Phil and his Pro buddy's show up and they hit the climbs really hard. From what I have been told.
http://www.philsfondo.com/
I don't know how hard these guys will ride on this ride
https://www.saganfondo.com/windsor-road-edition