After not finding what I was looking for, and doing some geo-research online, I created a Google spreadsheet listing all of the Catholic Churches along the AT. I have every intention of making it better by adding more detailed information, including info like phone numbers you can call to get a ride to Mass, etc.

Here's the link: https://drive.google.com/file/d/0Bzv...ew?usp=sharing

"Good Catholics" are supposed to make the effort to hear Mass on Sundays even when traveling. I figured that when I do my thru-hike (within the next few years), if I was zeroing in a trail town, it might be nice to know if there was a parish church within walking distance. I'd make the effort to go. Any others who might benefit from the info are welcome to have at it.