El Loco, Steel roller coaster at Adventuredome, Circus Circus Las Vegas, United States

El Loco is a steel roller coaster inside the Adventuredome at Circus Circus Las Vegas. Its bright yellow tubular track runs on black bolted columns and rises into a vertical loop. The layout has a 90-degree first drop and two dive-loop inversions, and the cars bank toward the outside of some turns. Riders sit in four-person cars with two rows of two, each car fitted with speakers playing music made for the ride.

El Loco opened on February 18, 2014, replacing the Rim Runner log flume that was removed in 2013; it reuses some of Rim Runner's structures, including the station. It was the second El Loco model built indoors, after Crazy Bird, and the second in the United States, after Steel Hawg. Early reports promised a beyond-vertical drop of up to 120 degrees, but the finished coaster has a 90-degree drop.

The name comes from the S&S El Loco coaster model, and the ride's four-rider cars carry speakers playing music made for it, a mix of hip hop, rock and Latin beats. The station reuses structures of the Rim Runner log flume that stood here before.

El Loco sits inside the Adventuredome at Circus Circus Las Vegas, so riders reach it through the resort rather than from the street. Since August 2019 every rider must have at least one functional hand and arm, and guests with leg amputations cannot ride. Cars hold four riders in two rows of two.

The four-rider cars carry two rows of two, and each car has speakers playing music made for the ride, a mix of energetic hip hop, rock and Latin beats. The soundtrack runs through the 90-degree drop and both dive loops.