This is a list of regional cycling events. Many of the events are based around gravel roads in VT and NH and have a variety of routes accommodating all skill levels. The courses vary from 16 miles to 50+ miles and can be smooth gravel or challenging class 4/6 roads with significant elevation changes. The Prouty is the exception as it includes road-only courses varying between 20 and 200 miles!
For more events, try the events calendar at BikeReg: BikeReg.com - online cycling event registration