Check out the coolest mountain bike stage race and festival weekend. VisitPA / HighSpeed Cycling is putting on the the Marysville MTB weekend again this year on the 4th of July weekend.
Here is some info on the event. Pre-register at Bikereg.com to save yourself and the promoters a lot of time.
http://www.bikereg.com/events/register.asp?eventid=6710
Bring the whole family as there are quite a few things for everyone to do.