Today I reached milestone 3: from lothlorien down the anduin to rauros falls at 1309 miles / 2106km. According to people who keep track of such things, this part of the journey took 11 days and was mostly paddling on the river. From then on the fellowship breaks up and continue independently: frodo and sam 470 miles to mt doom; merry and pippin 355 miles to isengard; aragorn, legolas and gimli takes a longer route of 484 miles to isengard.
There are only 470 miles left on the task, I will be able to complete this. A goal is by the end of the year; B goal is by the end of Q1 next year. I’ll probably do the back part of there and back again: after being rescued by giant eagles there is the 1625 miles from minas tirith back to bag end.