Originally Posted by
axolotl
Yes, it's uphill, but it's not very far, about 1 mile. Google maps says Frostburg is about 250 feet higher than the GAP trail. Frostburg is a pleasant college town, so I'd stay there. By the way, it's downhill all the way from Frostburg to Cumberland. My recollection is that I only had to sporadically pedal from Frostburg to Cumberland.
It is a VERY steep climb and depending on the location of the hotel, there is more up.

I would not want to make that climb or even walk after 74 miles. I might opt to just push on to Cumberland. As you wrote, it is pretty much downhill or flat from there.
If the OP is arriving on the weekend the scenic train might be running and he could take that on into Cumberland.
You pretty much need to pedal from the first tunnel (past the Big Savage) on into town but it can't be more than 3-4 miles. You will be going at a pretty good clip past the Frostburg turn off. It would be a shame to stop there.