You have been encouraged to learn the hidden tracks and paths of Eregion so that you may travel there more quickly.
'Hail, ${PLAYER}. Have you seen much of the Eregion? It has much changed since Elves lived here, and there is little of the Elves left here. I have spent much time learning these changes, so that we can move quickly here to Echad Dúnann unseen by the eyes of the Enemy.
'If you would seek to learn these paths, I would share such knowledge with you. First, though, you must explore Eregion. Many of the landmarks and points I reference would be useless to you unless you saw them first with your own eyes.
'Go and explore Eregion. Once you have done so, return to me, and I shall share with you my knowledge of the secret way to Echad Dúnann.'
Explore the Elf ruins and dens of the beasts found in Eregion.
Tinúriel told you that for you to learn the quickest route to Echad Dúnann in Eregion, you must explore the land and learn its hidden tracks and paths.
Tinúriel is at Echad Dúnann in Eregion.
Now that you have explored Eregion and become familiar with its ruins and the dens of the beasts here, you will be able to understand Tinúriel's instruction on the secret way to Echad Dúnann.