It's mostly a social event - a fun run for motorcyclists to travel the countryside together.
Raising money for a couple of charities - in this case, Camp Wonderland (which provides a camping experience for the disabled) and the Central Missouri Honor Flight - was the added bonus.
A Saturday event connected with the Jefferson City Jaycees Fair was a poker run, with about 20 motorcycle riders leaving the fairgrounds shortly after 10 a.m. for a 160-mile trip.
"It's for the fun," said Karen McDaneld, who spent the day riding behind Jason Besche of Russellville. "It's all easy for me!
"He doesn't want me to drive."
They joined the event "mainly for something good to do," Besche said, "and it was for Camp Wonderland down at the Lake, today."
Jack Huddleston, Jefferson City, agreed.
"I do them pretty regularly," he explained, "because of the cause more than anything.
"The Honor Flight is the main thing - that and the Camp Wonderland."
The event is for anyone who wants to ride - it's not a "club" for a certain kind of bike.
Motorcycles of all makes began returning to the Jaycees' Fairgrounds around 4:30 p.m., after making stops in Eldon, Cole Camp, Sedalia and Jamestown.
"Were we (really) gone six hours?" McDaneld asked.
Riders buy "hands" to enter the event - sheets of paper with blank squares lined up with the suits and faces of playing cards.
The sheets cost $20 for the first hand and $10 for each additional hand.
At the event's starting and ending points, and at stops along the way, each rider draws a card and the paper is marked with that card and the location it was drawn.
The three best hands at the end of the day win prizes of $75, $50 and $25.
"Normally, at most poker runs, most winners donate their (prize) money back" to the charities for that event, said Roy Wright, this year's Jaycees Fair stage crew chairman.
He thought Saturday's stormy forecast didn't keep many riders away from the event.
But Huddleston said: "I think the weather held a lot of the people back today."
And there was rain, in the morning.
"We got wet a couple of times, but we dried out pretty quick," Huddleston said.
Besche added: "It was just kind of a mist - enough to get our pants wet."
The day ended with a mix of sun and clouds, and a breeze.
And donations to two Mid-Missouri charities that still were being counted Saturday night.