HI UMTerp,
Sorry for the delay in getting this information. Her 1/2 marathon time was 2 hours 3 minutes. Not sure how this would translate to pace time for a marathon. She has been training.
Her bib number is 7958 so it looks like she is in corral F.
I'm guessing since you don't know what her planned marathon pace is, that this might be her first. A 2:03 HM translates to a race equivalent 4:17 marathon.
But that's fairly unlikely to hit in your first marathon, unless you are on a very high improvement rate. I'd venture to guess it'll be more like +30 minutes, so a 4:45 (and this is if DD plans to run throughout and not take advantage of some of the perks of the Disney marathon like characters and riding theme park rides). I'll provide both cases on the estimates:
She is projected to start at 6:04am. The ideal viewing locations in the beginning are either TTC or MK Main Street. She is projected to hit TTC at 6:43-6:47am. The last spectator bus to the start line is at 5am. So you should have plenty of time to catch the final spectator bus from Caribbean Beach to EPCOT (you can also take an uber/taxi to TTC or MK). Get on the Monorail at EPCOT and ride to TTC. TTC is a nice spot because it's easier to spot your runner.
She is projected to arrive at MK Main Street at 6:54-7:00. There is very unlikely enough time to see her at TTC and MK. MK Main Street is an iconic place to view your runner, but it is much tougher to spot your individual runner unless you have a good plan in place (stay to a certain side of the road, text ahead of time, etc.).
She is projected to hit the Polynesian (or cone alley as known to runners) around 7:18-7:26. So, like
@IamTrike suggested at the beginning you could do TTC and then walk over to Poly.
The only other common location to view marathon runners is outside the AK entrance. She is projected to arrive there between 8:21-8:36. Since the park opens at 9am, the bus from Poly should be running to AK. So you could see her at Poly and then head over to AK using the bus system which should start running sometime around 7:30-8:15am dependent on whether there are early buses for breakfast at AK (you could ask your own hotel on that morning when the bus system starts to confirm timing).
Then head from AK to ECPOT. There should be a bus that goes between the two parks by 8:21-8:36. Since her finish projection is 10:20-10:50am, then you have enough time. If you have park tickets to EPCOT, then you could either view DD inside the park or outside the park at the finish line. Just depends on what kind of experience you want. Last moments of her run, or congrats at the finish line.
So timing wise, it seems like a TTC -> Poly -> AK -> EPCOT is a reasonable viewing pattern if you desire to see DD multiple times.
If you sign up for runner tracking (
link), then you can receive alerts when she hits the timing mats. I've highlighted in blue when I estimate she will hit those mats. You can use the runner tracking and my estimates to calibrate the timing I've provided here. For instance, if she hits the 5 mile mat at 6:50am, then subtract 3 min from future projections on the top row. If she crossed the 5 mile mat at 7am, then add 7 min. Watch the "estimated finish" in runner tracking as well to see how closely it tracks with mine to figure a good estimate when she should arrive where.
Hope this helps!