Thunder Run is a powered roller coaster, themed after a runaway mine train, founded at Canada's Wonderland, in Vaughan, Ontario, Canada. Rather than having a traditional chain lift hill, the train has an electric motor on board. The train (consisting of nine cars of two rows of two seats, plus an extra single row at the front of the train) flies directly into the Wonder Mountain, the artificial mountain that is a trademark of the park. The coaster opened on May 23, 1981, and operated until 1985 as Blauer Enzian, but in 1986 it was relocated, extended, and incorporated into the Wonder Mountain.
The ride occupies the interior of the Wonder Mountain, which was initially supposed to hold a "Bavarian Market". Instead, mechanical equipment was placed inside, which was later relocated to the "roof" of the mountain to make room for the ride. The relocation of mechanical equipment also resulted in the Wonder Mountain walkway to be closed. Riders on Vortex can still see remnants of the look-out terrace before they reach the first drop.