Every week now if you look on a local calendar you can find a race of some sort. In some areas you may see as many as 3 5Ks in a 15 mile radius. That is some stiff competition. SO what makes one more desirable than the other?
A few years ago when I first started to participate in runs, I chose those whose price was fair for their distance, and close to my comfort area. Now my comfort area is a lot bigger but I am still picky about prices for races. How much will you pay for a 5K?, 10K?, Half-Marathon? Or Marathon?
I also find myself looking at events which have a good history. They have been around for a while. Do you look to run for races that give out swag? What is the swag you live for in a 5K? Does it matter?
Do you just look at your schedule and mark off the race that fits in where it can?