Motorcycles will roar again through the Smoky Hills.

May 20 marks the 13th annual Thunder on the Smoky motorcycle rally. Bike enthusiasts will come from all over to take part in the festivities.

"It's hard to know how many people come, because they're coming and going all day," said Scott Johnson, event coordinator. "We estimate between 3,000 and 5,000 people come each year, depending on the weather."

This year's events will start at 6:30 a.m. with breakfast at the Marquette American Legion. Around 30 vendors will open shop from 9 a.m. to 4 p.m., and the rally will kick off officially at 10 a.m. with a presentation of the flags.

The poker run registration opens at 10:15 a.m., at $15 for one hand or $25 for three hands. Money will go to support the Kansas Motorcycle Museum.

"That's one of the unique attractions we have," Johnson said. "Our displays at the museum are always changing, so people come back to find out what's new."

Bikers who finish the course with one of the top three hands will win prizes.

"Riders like to go places," Johnson said. "I'm not a biker myself, but they have these rallies all over the state, and I'm amazed how many people they can attract."

The Steel Scare Crow band will perform at the city park at 10:30 a.m.

"They're a McPherson area group," Johnson said. "We have a different musical group every year."

Last year's festivities included motorcycle races put on by a private individual. Due to scheduling, those races will not take place during Thunder on the Smoky.

"That's separate from Thunder on the Smoky, they just happened to be the same weekend last year," Johnson explained.

For more information, contact the Kansas Motorcycle Museum at 785-546-2449.