Key: Phantom Forest Portals

Images and portal debug info taken from this thread, credit to Fiel.

 Visual map, made by Stereo

 With gate portals

Thanks Stereo.

Key

Portals in blue are 1-way only; going back through the portal you came from will take you somewhere else, so beware.

Gate portals require you to have a Map of Phantom Forest (obtained from the level 70 quest Lost in Translation). To my knowledge, none of them are actually 2-way, though the pair in Dead Man's Gorge and Haunted Hill are in the same map as, and accessible from, each others' destinations.

Swamp Bog

A - Crossroads 2
B - Haunted House
Gate - Crossroads 2 (top)

Crossroads 1

A - Twisted Paths 2
B - Haunted Hill
C - Twisted Paths 3
D - Twisted Paths 3
E - Twisted Paths 2
F - Bent Tree
G - Swamp Bog
Gate - Forgotten Path (top)

Crossroads 2

A - Twisted Paths 1
B - Twisted Paths 2
C - Forgotten Path
D - Haunted Hill
E - Twisted Paths 2
F - Twisted Paths 3
G - Swamp Bog
Gate - Forgotten Path (top)

Crossroads 3

A - Forgotten Path (top)
B - Twisted Paths 5
C - Twisted Paths 3
D - Phantom Road
E - Twisted Paths 2
F - Twisted Paths 4
G - Twisted Paths 4
Gate - Forgotten Path (top)

Twisted Paths 1

A - Twisted Paths 2
B - Crossroads 2
C - Dead Man's Gorge
D - Crossroads 1
E - Crossroads 2 (top)

Twisted Paths 2

A - Phantom Road
B - Twisted Paths 1
C - Crossroads 2
D - Twisted Paths 1
E - Crossroads 1

Twisted Paths 3

A - Crossroads 1
B - Twisted Paths 2
C - Crossroads 2
D - Twisted Paths 2
E - Phantom Road

Twisted Paths 4

A - Crossroads 3
B - Dead Man's Gorge
C - Forgotten Path
D - Dead Man's Gorge
E - Twisted Paths 5

Twisted Paths 5

A - Twisted Paths 3
B - Crossroads 3 (top)
C - Twisted Paths 4
D - Twisted Paths 4
E - Twisted Paths 2

Haunted Hill

A - Bent Tree
B - Crossroads 2
C - Crossroads 1 (top)
Signpost - Creeping Evil
Gate - Dead Man's Gorge

Phantom Road

A - Twisted Paths 2
B - Twisted Paths 3
C - Crossroads 2
D - Crossroads 1
E - Crossroads 3
Signpost - Evil Rising

Bent Tree

A - Haunted House
B - Haunted Hill
C - Crossroads 1
D - Dead Man's Gorge
E - Crossroads 2
Signpost - Hidden Evil

Dead Man's Gorge

A - Forgotten Path
B - Twisted Paths 1
C - Bent Tree
D - Twisted Paths 4
E - Twisted Paths 4
Gate (bottom) - Dead Man's Gorge (top left)
Gate (top) - Haunted Hill

Forgotten Path

A - Valley of Heroes
B - Crossroads 3
C - Twisted Paths 4
D - Crossroads 2
E - Dead Man's Gorge
Signpost - The Evil Dead
Gate - Swamp Bog

Routes:

 Haunted House to Dead Man's Gorge (Raven Ninja camp)

Haunted House > right entrance
Bent Tree > D (top left).

 Haunted House to Creeping Evil (Leprechaun farming)

Haunted House > left entrance
Swamp Bog > A (left)
Crossroads 2 > D (bottom left)
Haunted Hill > Signpost.

 Dead Man's Gorge to Valley of Heroes (CWK jump quest)

Dead Man's Gorge > D (bottom right)
Twisted Paths 4 > E (far right)
Twisted Paths 5 > B (2nd from left)
Crossroads 3 > A (top left)
Forgotten Path > A (top left).

[SPOILER=Haunted House to Phantom Road (Lukan's quests)]Haunted House > right entrance
Bent Tree > C (center)
Crossroads 1 > D (far left)
Twisted Path 3 > E (far right)

 Haunted House to Valley of Heroes (if you have Map of Phantom Forest)

Haunted House > left entrance
Swamp Bog > Gate
Crossroads 2 > Gate
Forgotten Path > A (top left).

If you request any other routes to Phantom Forest maps only, I will put them up. I don't plan on adding the Crimsonwood Mountain maps, unless there's a huge demand for them.