I was there during my whole training for my first marathon. Every long run was hard, and even the short runs. I thought how could I run 26 miles, if I can barely make it through15, then 18, then 21. but I did it. I just kept going, and I showed up at the start, and before I knew it, I was crossing the finish line. I had tears welling up in my eyes as I rounded the final corner. I could see the balloons, I could hear the announcer, I was almost done running a 26 mile marathon. I couldn't believe.
This year as I train, I find myself feeling the same way. At every run, I think how could I go 26 miles. But I keep going, and I keep doing the runs. I will be there at that start on Sun Oct 1, and I will be there at that finish about 6 hours later!

One big milestone for me was the 15 miler. In the past, I have trained alone, and the 15 miler was where I always stopped, could never get passed. This year, I knew if I ran that 15 miler, I would make it to the marathon. And I ran it, so I know I can run the marathon. I just know. And so should you. If you have kept up with the training thus far, and finish each run (whether it was a good run or not) you too will make it to the finish.
Crossing that finish line is the most amazing feeling in the entire world. I cannot explain how cool it is. You just have to experience it!
Good luck! I WILL see you there!!