I know this isn't the longest or most difficult trail but on 11/20/11 I set out to lay down a time for a point-to-point record on the well-known Wildwood Trail in Portland's Forest Park. The trail is just over 30-miles and I ran it from Newberry Rd. to the zoo.
You can read my report and view the gps data, etc. here.... yassinediboun.com/yassinediboun/blog/item/wildwood-end-to-end-speed-record?category_id=379