PCT forum

Yes. Go to http://www.backcountry.net for a listing and subscription information for

PCT_List Form (extensive use)

CDT_List Forum

AT_List Forum

Florida Trail (FT_List Forum)

For aAnother site with multiple forum for a variety of different trails go to http://www.trailforums.com/index.cfm

Unfortunately that mailing list on backcountry, the only PCT mailing list TMK is full of banter, trolls and flamers. You have to weed through a bunch of garbage to find the useful information, though I admit some of their threads are fun to read.

There are a few forums dedicated to the PCT.
http://postholer.com

http://www.trailforums.com/trail.cfm

http://adventureonthepct.com/forums.php 9 not much activity )