Millennium Force were installed to illuminate the ride. Twenty COLORado Range and ten COLORado Ridge wash lights were installed at the base of the lift hill structure. When it opened in May 2000, Millennium Force broke six world records and used a new magnetic braking system instead of friction brakes found on most roller coasters. This new system enabled the use of a shorter brake run, which slows the train from down to a standstill in six seconds. Millennium Force held the records for tallest and fastest complete-circuit roller coaster until August 2000, when Steel Dragon 2000 opened. Millennium Force held the
Six Flags Great Adventure at Six Flags Over Georgia and Six Flags Great America. In 2004, new harnesses were added to the Runaway Mine Train and the up-charge attraction erUPtion was added to the Boardwalk. In 2005, the park added the world's tallest coaster called Kingda Ka and also dismantled Viper. With the addition of Kingda Ka, the season pass holders entrance to the park was closed because Kingda Ka's footprint went right over it. A new children's play area called Balin's Jungleland was also added. In 2006, a wooden twister coaster called El Toro was added in the spot formerly occupied by Viper,