Despite the efforts of the Elves, the Taurogrim have returned to Tholkát in Eryn Lasgalen.
'The Taurogrim have returned out of the lingering shadows of Eryn Lasgalen, and they seek to overrun Tholkát once more.
'Go, destroy their dens and drive them off!'
Taurog-dens can be found in Tholkát in northern Eryn Lasgalen.
You should destroy Taurog-dens in Tholkát.