We're later told (in an indirect way) where Hargon's Point is:
I think Paarfi meant "southeast," as southwest puts this hill in the middle of Redsky Harbor.
I guessed that Axelsbroke was halfway between Hargon's Point (the post, not the hill) and Dorindom.
Paarfi says he traveled "a distance of twenty leagues in less than half a day"; he left the night before, and arrived in the morning of the next day, so the "twenty leagues" here is the distance from Wetrock to Dorindom. However, on Steve's Map, Dorindom is 112 miles from Wetrock, so these leagues appear to be equal to five miles each, almost twice a "normal" league.
Northport is 600 miles from Dorindom on Steve's Map in a straight line, but Eremit can't smell the sea, so presumably they didn't follow that straight line (which would have brought them past the coast north of Wetrock).
I might be making too much of his guess that it's 1,000 miles, but Dorindom to Aussiar to White Harbor to Candletown to Northport is about 1,150 miles if you go around the bay White Harbor is located in. I had
earlier theorized that the Great Northwestern Road ran from Candletown around the southern tip of the Kanefthali Mountains and then towards Kana, but it could just as plausibly run from Candletown to Northport and then from Northport past Kana.
There's even mention of a road that runs from Aussiar, which is connected to Candletown via the White Harbor Pike:
Later, Livosha travels from Candletown to Ivaacim:
The first post is probably on the outskirts of Candletown; they actually meet up with another member of their party there, and Paarfi refers to them leaving Candletown after this post. They are almost certainly on the Great Northwestern Road at this point.
Ivaacim is 1,380 miles from Candletown, and that's in a straight line; the absolute shortest path I could find that went around the Kanefthali Mountains and Cold Sea is about 1,650 miles, but again, I think they were probably on the Great Northwestern Road, which I think passes through Northport.
It appears the nearest post to Ivaacim is about 8 miles away:
It's possible that there are multiple roads equipped with posts in this area, but they are obviously in a hurry (Paarfi describes a typical day as 4 posts), and the Great in Great Northwestern Road suggests it is a (if not the) major road in the area.
I extended the Great Northwestern Road from Northport to just west of Mount Kana (I can't see it actually going up into the mountains), then north around the Cold Sea, passing through Dinshouse and then heading northwest to Ivaacim.
I calculate the entire trip was a little over 2,000 miles.
"The middle of summer" (I'll guess the 109th day of the year) + four days + 1 day + the next day means they left on about the 115th day of the year. Paarfi says they arrived when autumn began (I'll call that "early autumn"), which is about the 157th day of the year, so their entire journey took about 43 days, which works out to be about 47 miles a day.
Paarfi describes a typical day as 4 posts, which, at 47 miles a day, means the posts were about 12 miles apart, but this apparently varies somewhat, since at one point, they were at least 15 miles from the previous post.