springcity.org is the website of the local cycling club here in Huntsville. Here's a list of out-of-town rides: http://www.springcity.org/otherides.html

Lots of riders here will be there for the Cheaha Challenge. You should also check out the 3 State 3 Mountain ride in Chattanooga. http://www.chattbike.com/events/3_state/3stchlng.htm

And our own 4 Hills Century with 7600 ft. of climbing http://www.alabike.org/fourhills/

ride profile. Notice the climbs get worse as the ride progresses.