Hi Thorongil, Welcome to the walk!
My favorite site for the ol' kilometer/mile translation is:
http://www.runnersweb.com/running/km_miles.html
I've recently acquired Excel so I've got it all auto-calculating now
To change kilometers to miles, multiply by 0.6214.
For myself:
You have walked 26 miles.
You have passed Green Hill Country (18).
You are only 1 miles from Black Rider Stopping Place.
You still have 432 miles to Rivendell.
It's going to be fun to get to the Black Rider Stopping Place....living in the big city, exactly one mile from my home is a 4-way stop and "get off the road!" is all too likely to become a reality lol.
Happy Easter y'all!