Your first step is to figure out a 5k course. (you can approx. with a car, or bike with odometer) You will probably need a timer( he can verify the distance for you).You can look up a race timer on the internet. You will need to design an applications with disclaimer, and you can list with active online, it's free, they charge the runner $3.00 and do all the work that gets submitted to the timer. In order to raise money to pay for advertising, t-shirts, medals, and timer, you can solict local merchants to be sponsors. Our sponsors pay $250 to be listed on the back of our t-shirts. I also ask the local fire dept to provide EMT support/ and police to assist in road closure( I have letters I send each year to them). The food is mostly donated. We also have local merchants that provide raffles for the runners. Our award ceremony is 3 deep for 16 age categories with alumni competing for the special trophy cup- top female/ top male.

It is awesome how it all comes together each year. The process starts in December. I have, from the beginning, delegated tasks to only a few volunteers(publicity, data input, mechant solicitation, day of race volunteers, application mailing) Day of race we have students and adult volunteers that show up each year to bring it all together.

Good luck, the first year is the toughest, however, it will remain as a blueprint for the following years to come.