If your going to be in the killington area the ski resort has a really good downhill bike park, also Ascutney Mountain is really good great climbs and downhill thats probably my favorite. Stowe VT is good, Perry hill in waterbury Vt, Kingdom trails in East Burke are crazy good… New Hampshire has Bear Brooke State park which is huge and has lots of good riding, FOMBA trails in Manchester NH are great. Hope some of that was helpful….