This is one of my favorite races at one of my favorite breweries. I've run it twice and I plan to run it again in 2015 (already signed up!) All the necessary information is communicated (parking, when to arrive, where to leave your stuff, etc) beforehand via email and packet pick up is available at Running Wild downtown Iowa City. The shirts are always very nice (I wear mine all the time to gym) and come in women's sizes, dry-fit. Afterwards, you receive a beer and there is food. Last year the food was from Noodles and Company, I preferred the pizza they offered in 2013 but it's fine either way.
The only downside is that it is usually REALLY hot. It's August in Iowa, after all. They hold the race in the afternoon and it can be 90+ degrees during the run. There are plenty of water stations throughout.