The 22-foot tall, 340-ton granite rock is crossing four counties and 22 cities on its way to a new exhibit called Levitated Mass, because the rock will appear to be just that.
As of Sunday night, it was right on schedule as it moved through Rowland Heights.
Spectators stopped to take photos with the rock. Some even joined the rock in its slow trek down the road.
"We want to see when it's done, walk under it, see the suspended rock" said Riverside resident Dan Spain.
"We're here every night watching," Gerri Spain said.
The move began Tuesday night at a speed of about 5 mph. It's expected to arrive in Los Angeles on Saturday morning.