I plan on shooting for a 5:50 first mile, a 6:20 second mile, I hope to lay the hammer down for the last mile in 5:20, and then a final 29 second last tenth+ would get it.

I run these races with my kids in a double jogger. Needless to say that is why the hills have such a great affect on me. My ultimate goal was to break 18:00 with the kids before I hang up the stroller. They are getting too big now(4 and 2 years old). If I reach my goal on Saturday I think I will sell the stroller and concentrate on the marathon.

I know it sounds like a stretch but I wonder if it is possible to drop 1:12 off of your 5k time in two weeks?

I ran a 5K on a relatively flat course(But very windy) two weeks ago. It starts out on a mildly steep hill then goes down hill for more than 1 mile. However, it then goes up a gradual hill for more than 1.5 miles before finishing down a steep short hill.

I managed a 19:12 but there were a lot of turns at the end so I couldn’t really get into my full sprint as early as I wanted to.

The course I am going to run on Saturday is as flat as it gets in our area(Raleigh NC). It has a nice 1 mile flat section to start and then it goes up for about .75 miles. Then it is all downhill or flat from there.

I tend to do much better when there is a flat section or a nice long downhill section to end a race. I have trouble climbing hills but the opposite is true on downhills. I can really use my 6’4” height(36” leg length) to my advantage on the downhill sections.

So is it possible to shave that much time off just because the course is flatter?

Here is a little about my running. My PR for the 5k is 18:26(last fall) on a course very similar to the one I will run on Saturday. I finished up with a 1:03 last quarter mile on that race. That last quarter mile made all of the difference. That shaved about 25 seconds off of my average pace in that quarter of a mile.

I recently ran a 59 second .29 miles to start a race down a steep hill. Yes I know I have trouble holding back when I see the steep hills.

I plan on shooting for a 5:50 first mile, a 6:20 second mile, I hope to lay the hammer down for the last mile in 5:20, and then a final 29 second last tenth+ would get it.

I run these races with my kids in a double jogger. Needless to say that is why the hills have such a great affect on me. My ultimate goal was to break 18:00 with the kids before I hang up the stroller. They are getting too big now(4 and 2 years old). If I reach my goal on Saturday I think I will sell the stroller and concentrate on the marathon.

Only one way to find out.
That's going from @ 6:11 to 5:47 pace. Pretty big jump. And still 26 secs better than your PR. (Unsure of your other training: Perhaps your'e in better shape now, but the kids are heavier, too.)
Comparing courses is tricky because of the variables you mention.
Good luck. Here's hoping you do!

Looks like my chances are dwindling. Forecast is for Thunderstorms and 20+ mph wind gusts! Not exactly PR weather now is it! Especially since the double stroller has the drag coefficient of a MACK truck!