PENDLETON — The 20th annual Old Iron Show will roll, crank and pop into Roy Raley Park this month to show off mechanical devices from years past.

John Olsen, committee member and president of the Umatilla County Historical Society, said the event started as a showcase of pre-war equipment and engines.

“It was old hit-and-miss engines and tractors, Model A’s and Model T’s,” Olsen said. “It’s grown to include things from the ‘60s and ‘70s now. If it’s old, it comes.”

Hosted by Heritage Station Museum and the Umatilla County Historical Society, this year’s Old Iron Show takes place June 7-9 at Roy Raley Park in Pendleton. The first Old Iron Show took place in the parking lot at Heritage Station Museum with a handful of old tractors. The event then outgrew the parking lot and moved to Roy Raley Park.

“It’s popular,” said Shannon Gruenhagen, UCHS director of programming and education. “People come from all over. It’s crazy how far people drive for this.”

Past participants have driven from across Oregon, Washington and Idaho and as far as Long Beach, California, for the event. Gruenhagen said some of the participants and the displays are different every year. Attendees can expect to see old iron engines, classic cars, antique tractors and a handful of other mechanical equipment.

“Sometimes, something appears one year, and then you never see it again,” Gruenhagen said. “One year, someone brought in an old jail that had bunks that folded down. It hasn’t been back. You never know what’s going to show up, so you really have to go every year.”

Other items that have appeared at the Old Iron Show include an ice cream maker, an antique washing machine and an automatic corn sheller. Enthusiasts will be on hand to demonstrate the equipment and talk about how it works.

“There’s a lot of people that don’t really understand the methods of the mechanical stuff from years ago,” Olsen said. “They run all that stuff in the park, and the kids can come and see it and have some idea of what actually took place.”

In addition to the displays, there will be a vendor booth selling Old Iron Show merchandise, 3rd Generation BBQ food truck and a train driving children around the park.

“You don’t have to prepare anything,” Olsen said. “Come down and have a good time.”

There is no charge for participants, and the event is free for visitors as well. Donations are encouraged.

The 20th annual Old Iron Show runs from 8 a.m. to dusk on Friday, June 7, and Saturday, June 8, as well as from 8 a.m. to 1 p.m. on Sunday, June 9.

For more information, visit heritagestationmuseum.org.