Revving up their engines for the 15th year, the annual Shriners' Run will begin Saturday at 8 a.m., at McKenzie Park, 320 S. First St., Hermiston.
The event is a combined effort of Hermiston's Desert Shrine Club and the Shriners chapters from Pendleton and Milton-Freewater.
The rally features motorcycles and automobiles, including vintage vehicles.
"The route is secret with directions given to each rider at each check point," said organizer John Perkins of Milton-Freewater. "The directions tell them where each next check point is."
Veterans and Friends of Oregon are first-time sponsors for the event.
Fellow organizer George Prather did a test run on the route and said the course is mostly backroads with no highways at all involved, although the roads are fairly well maintained.
"Some of the roads are pretty crooked with some good scenery, but they do need to watch out for four-legged critters," Prather said.
Perkins said at each check point riders will play some sort of activity like a bean bag toss or marshmallow-spitting game.
Additionally, at the end of the run, participants will guess the total distance of the route. Prizes will be awarded for those with the closest mileage, as well as oldest and youngest riders and passengers.
"It's a secret but not a secret. It's just so people don't guess the mileage right away," Prather said.
During last year's run, 100 riders participated and $1,000 was raised for the Desert Shrine Club.
"We'd like to see that number (money raised) double and we're hoping for 150 or more riders this year," Perkins said.
Riders should complete the run by 2:30 p.m. and return to McKenzie Park for a barbecue lunch, where refreshments and T-shirts will be available for purchase. Also, a 50/50 drawing with prizes donated by local businesses will be held.
The Shriners' Run is $15 per rider or driver and $5 per passenger. Contact Perkins at 541-861-0301 or perkins0590@ msn.com for more information.