Burning Man cyclists are taking flak after an Instagram photo showing a sea of dusty bicycles abandoned on the playa was widely shared on social media.

The haunting photo by Logan Mirto shows some of the 3,000 to 4,000 bicycles left by Burners who couldn't be bothered to take their sand cruisers home. One commenter said that the image looked like "Amsterdam Central in a dust storm."

The mass littering of two-wheelers was condemned by other, more conscientious Burners, who admonished their brethren and reminded them of the Burning Man credo "leave no trace."

"If you left your bike @ Burning Man.... you are a {insert foul name here}!! Come on folks, we can do better!" wrote Jeffrey Pankey on Facebook.

His post got plenty of attention. Trucks began rolling in from Reno to collect the bikes.

"FOLLOWUP TO TUESDAY'S BIKE POST!! HOLY S—! After 850+ shares, Reno showed its true spirit," Pankey wrote. "ALL DAY LONG A SEA OF TRUCKS AND TRAILERS. THE BIKES ARE ALMOST GONE!! Amazing the power of the internet. And the trucks are still coming up 447. Thank you, Reno. Please share our thanks."

Happily, Black Rock Desert is again bike-free.

Jim Graham of the Burning Man communications team confirmed Thursday that all of the discarded bicycles had been removed.

In an email, Graham explained that every year, about 1,000-2,000 bikes are left on the playa despite firm reminders to participants to pack out all of their "MOOP" — matter out of place — including bicycles.

This year up to 4,000 bicycles were left in the desert, he said.

"More bikes were abandoned than our charitable contacts could absorb, so we put a call out to groups looking for bikes to refurbish," Graham said in the email. "We received more than 80 inquiries over two days and, as of today, all usable bikes were taken. Broken and otherwise unrepairable bikes have been sent to a recycler."

Graham said Burning Man organizers will be looking into how to minimize the problem in future festivals.