Tuck, roll, crawl or sprint to a computer: Wednesday is the last day to preregister for Saturday's Tuff Tornado Run.

Organizers behind the second annual Tuff Tornado Run are optimistic that this year's obstacle course will enjoy a clearer sky than their first run last year, which saw about 300 participants despite cold weather and precipitation.

Funds raised by the event fund three Golden Tornado Scholastic Foundation programs that give to the Butler Area School District. Those are the Kids' Weekend Backpack Program, creative teaching grants and school technology purchases.

Audray Muscatello Yost, a scholastic foundation member, brought the idea for the race to Butler County last year after seeing a similar event in Rhode Island.

As of Tuesday afternoon, about 350 people were signed up for the event, according to Yost. Pre-registration is $5 cheaper than registering on the day of the event. Those interested can register online at goldentornado scholasticfoundation.org by 8 p.m. Wednesday or sign up on the day of the event between 11 a.m. and 12:30 p.m.

Saturday's festivities begin at 1 p.m. and last until 4 p.m. The run is at Alameda Park. Several food trucks will be present, and a raffle will be held, but the main attraction is, of course, the run.

The run is about a two-mile stretch with 20 obstacles along the way. Some promise physical challenges — such as balance beams or hay bale climbs — while others will bring dirty fun — including a “color run” portion or a foam spraying bubble run. Fear not, clean freaks: the Meridian Volunteer Fire Department will be on-hand to spray off competitors upon completion.

“If you can't hop over something, just zigzag around it,” Yost said. “It's whatever you can do. That's what makes this an all-ages event.”

Some of the obstacles are being donated from various sources. Sam Zurzolo, a Butler Township commissioner, built several and organized the construction of others, Yost said.

Aside from more obstacles, this year's run features a few subtle improvements. Some donors gave over a certain threshold and will have inspirational quotes displayed throughout the run. Some sunglasses will be on hand to give to participating children to protect their eyes as they go through the color run section.

The event is being organized by the scholastic foundation, the backpack program and various Butler community members.

Expect to see some students volunteering during the race, too. About 15 Butler junior ROTC students are working the race, as are about 15 students in the Butler Area School District's Starfish program, an anti-bullying initiative.