Sidewinder, Steel roller coaster in Lakeside, Colorado, US.

Sidewinder is a steel roller coaster at Elitch Gardens in Denver, Colorado. Riders climb fifty feet of stairs to a raised loading station, are launched down a hill through a single vertical loop, then ascend a braked slope opposite the station. The train repeats the layout backwards before returning to the station.

Sidewinder began as the Roaring Tornado at Magic Springs & Crystal Falls before operating at the original Elitch Gardens from 1990 to 1994. It was moved to the current Elitch Gardens in 1995. It is one of only three Arrow Dynamics launched loop coasters still operating, alongside Diamond Back at Frontier City and the Revolution at Blackpool Pleasure Beach.

Sidewinder runs at Elitch Gardens in Denver, where it has operated since 1995 after moving from the original Elitch Gardens site. Its lime-green track, painted for the 2010 season, replaced the darker shade it had carried since its original white. The ride is one of only three Arrow Dynamics launched loop coasters still operating worldwide, alongside Diamond Back at Frontier City and the Revolution at Blackpool Pleasure Beach.

Riders climb about fifty feet of stairs to reach the loading station, since the ride does not start at ground level. The train launches down a hill into the loop, then ascends a braked slope opposite the station before repeating the layout backwards. The coaster reopened in 2025 after a two-year closure.

Sidewinder is one of only three Arrow Dynamics launched loop coasters still operating worldwide, alongside Diamond Back at Frontier City and the Revolution at Blackpool Pleasure Beach. Riders climb fifty feet of stairs to the loading station before the train is launched down a hill into the loop.