According to WTA, ten of the most endangered hiking trails in Washington’s are:
1.
Golden Horn Trail:
Methow Valley
2.
Circle Peak/Crystal Lake Trail:
Darrington
3.
White River/Indian Creek Trail:
Lake Wenatchee
4.
Necklace Valley Trail:
Leavenworth
5.
Esmerelda Basin Trail:
Cle Elum
6.
Mineral Creek Trail:
Cle Elum
7.
Boundary Trail:
Cowlitz Valley
8.
Big Creek Trail:
Cle Elum
9.
Grassy Knoll Trail:
Mount Adams
10.
Skyline Loop Trail:
Olympic Peninsula
http://www.wta.org/~wta/cgi-bin/web10.pl?Advocacy+nw+nd+news68
Here's an article:
http://www.columbian.com/06052002/clark_co/287908.html