Grand County sheriff's officials say Kyle Lee Stocking, of West Jordan, died about 3:30 p.m. Sunday, after hitting the ground below the 140-foot-tall Corona Arch near Moab.
Sheriff's Lt. Kim Neal tells The Salt Lake Tribune the length of rope from the arch was miscalculated and sent Stocking swinging into the ground as he went under the red sandstone formation.
Rescuers say he was dead at the scene.
Viral videos have bolstered the activity, which involves using rock climbing ropes and jumping from near the top of the arch. One titled "World's Largest Rope Swing" has racked up more than 17 million views on YouTube since it was posted in February.