[pct-l] referring to points on the PCT

[David Hough reading PCT-L]

Because the PCT changes from year to year, representing points of interest
by their distance from Mexico is guaranteed to cause problems when different
people are trying to coordinate with different printed and electronic data
sets.    People who through-hike once and get all their data at the same
time might not be aware of that.

Life would be simpler if within each section, points of interest were
identified by distance from the beginning of the section.     Then that
identification would only change when the trail changed in that section.
The "data book" format pages and the maps could still indicate the distance
from Mexico as well as the distance from the beginning of the section.

Thus the Dog Trail junction in Castle Crags would probably always be
TRP7 instead of TR1506 one year and something else the next year.

If there were any chance of confusion between Campo and Ashland or
Donner Pass and Rainy Pass, one would also have to indicate the state
C, O, or W.