El Loco rollercoaster at the Adventuredome at Circus Circus

El Loco rollercoaster at Circus Circus' Adventuredome The El Loco rollercoaster opened at the Circus Circus' Adventuredome in February 2014. It features a 90-foot ascent, followed by a drop that produces a negative 1.5 "verticle G," a 180-degree turn, and reverse 240-degree roll that turns into an inverted drop. The coaster reaches a maximum speed of 45 mph and is the only indoor coaster of it's kind in the U.S., and is the second indoor El Loco coaster in the world, according to MGM Resorts.