A while ago somebody (it might have been acroorca2002) posted about a
trip to visit the northernmost point in mexico, which I guess under
our notation would be something like mxn or mxus2azcabc. Anyway, I
was planning a visit out the that area either this coming Friday or
Saturday, and was wondering if anyone had any hints on the best ways
to approach the point. I guess Lowell would have the goods on where
exactly in the Colorado River the tripoint is, since he's our
resident expert on the usmx treaty.

I suppose another historical tripoint I could pick up would be the
historical tripoint between California, New Mexico Territory, and
Mexico before the Gadsden Purchase was made. That would be where the
Gila River flows into the Colorado, on the north side of Yuma, right?
Lowell, do you have any idea whether that tripoint would be in the
river midpoint, the thalweg, one of the banks, or what?

I also plan to pick up the 33N115W confluence point, but from the
description of that on www.confluence.org, it sounds pretty easy to
find with a GPS receiver. If I'm feeling lucky I might try for
32N115W, but that sounds like 5 miles of driving on questionable
roads in Mexico, which I'd feel a lot better about if I had (a) 4-
wheel drive, (b) somebody fluent in Spanish with me, and/or (c) a
lack of memories of bad experiences getting cars stuck in the mud in
the middle of the desert in the US, and that was bad enough. Come to
think of it, one time I was in a caravan of Suburbans on a Geology
field trip in Mexico on a road even the locals didn't take any more,
and one of the vehicles got stuck in a rut. Thank God we had a winch.
Car trouble is no fun.

Adam