The Korean American Friendship Marathon is run on the same course as the Two Rivers Marathon. The course drops over 700 feet with no major climbs (the only climb of note is 60 feet over a quarter mile 9 miles into the race).
The downhill to flat course, coupled with the typically cool race day weather, can lead to many PRs and BQs. Be cautious on the early downhill miles so you have something left in your quads for the latter miles.