AIDS Ride - 4 rides: 1- San Francisco to Los Angeles California, 2- Norfolk VA to Washington DC, 3- Bear Mountain NY to Boston, 4- Twin Cities to Chicago Illinois.
AIDS Vaccine Rides - 3 rides: 1- Montreal to Portland Maine. 2- across Montana 3- Fairbanks to Anchorage Alaska.
ALS Express - Ride for Lou Gehrig's disease in Philadelphia area
National MS Society - This organization is split into regional chapters which almost all have cycling events to raise money.
Ride for Hope - Ride for HIV/AIDS in Philadelphia area
Tour de Cure - National rides that benefit American Diabetes Association. Find rides by searching through state listings.