Twelve years after Largo, Maryland's Adventure World (then known as Wild World, and now known as Six Flags America) relocated from New England's Paragon Park and re-debuted a John Miller classic 1917 out & back coaster as Wild One, the rapidly growing park was looking for a second wooden coaster to add to the park's collection of coasters. Adventure World contracted Great Coasters International (GCI) to construct a second wooden coaster, following Hersheypark's Wildcat. The wooden structure of the new coaster rose up to carry along 3,200 feet of some of the most twisting coaster track the world had seen since Ontario's famed Crystal Beach Cyclone of the 1920s. With 21 crossovers, a steep 58-degree first plunge and barely any straight track to speak of, the wooden twister opened on May 2, 1998 as Roar!

Once Roar's PTC train is loaded and lapbars secure, the wooden rails start moving past as a beginning element composed of three 90-degree curves leads riders to the lift hill. The chain lift carries the train slowly up to the top of the 90 feet of lift, up and over a twisting, turning layout laid out down below. Once the click-clanking ceases, the train heads straight towards the impossibly-tight curvature of a steep, twisting first drop - and Roar wastes no time in navigating the curving drop to the bottom. The track next wraps around the layout's Fan Curve - a 270-degree inclined spiral that sends the train into a first Camelback Hump. After coasting over the Camelback, Roar dives back down and takes passengers up and around a second Fan Curve over the pre-lifthill curve. Diving down and curving to the left, the coaster speeds over a quick hill and sweeps through a 270-degree banked turn leading into the ride's tunneled section where the train encounters the layout's steepest banked turn. Exiting the tunnel, the track re-traces the exterior of the second Fan Curve and begins the final furious run to the brakes with a high-speed curving hop and final banked turnaround.

Roar has gone down as one of the wildest, most twisting wooden coasters to date.