My first marathon was Wakefield MA. I did the race in 2006. That was 2 years after almost to the date I had run a race (the peaks island 5 miler in Maine), where I was just not ready to deal with the heat and I really took a beating. I decided after that race that I should either get serious about running or drop the sport.
Wakefield is a different marathon in that it is 8+ 5k loops around a lake and it starts at 7:00 PM on a Friday night. The course is relatively flat and the field size is limited. It was very stormy that night so the race start was held up by 1 hour to wait for the lightning to stop. It took me 5 hours and 46 minutes. I remember finishing the race and thinking wow!
How about your first marathon experience?