Provavelmente não, mas ninguém pode dizer com certeza. O texto relevante de O Silmarillion é:
Yet he yielded at last to the will of Maedhros, and they took counsel together how they should lay hands on the Silmarils. And they disguised themselves, and came in the night to the camp of Eönwe, and crept into the place where the Silmarils were guarded; and they slew the guards, and laid hands on the jewels. Then all the camp was raised against them, and they prepared to die, defending themselves until the last. But Eönwe would not permit the slaying of the sons of Feanor; and departing unfought they fled far away. Each of them took to himself a Silmaril, for they said 'Since one is lost to us, and but two remain, and we two alone of our brothers, so is it plain that fate would have us share the heirlooms of our father.'
But the jewel burned the hand of Maedhros in pain unbearable; and he perceived that it was as Eönwe had said, and that his right thereto had become void, and that the oath was vain. And being in anguish and despair he cast himself into a gaping chasm filled with fire, and so ended; and the Silmaril that he bore was taken into the bosom of the Earth,
And it is told of Maglor that he could not endure the pain with which the Silmaril tormented him; and he cast it at last into the Sea, and thereafter he wandered ever upon the shores, singing in pain and regret beside the waves. For Maglor was mighty among the singers of old, named only after Daeron of Doriath; but he came never back among the people of the Elves. And thus it came to pass that the Silmarils found their long homes one in the airs of heaven, and one in the fires of the heart of the world, and one in the deep waters.
Não é muito específico! Tudo o que você pode dizer com certeza é que o acampamento de Eönwe deve ter estado a leste de Belierand, já que Beleriand, a oeste, havia afundado durante a guerra que acabou com a Primeira Era.
Ainda é muito difícil ver por que o acampamento dele estaria no que era mais tarde Mordor, já que era longe ao sul e leste de onde a ação era - Lindon ou até mesmo a área onde o Shire mais tarde teria ficado muito mais perto dos combates.Mas se você argumentar que Maedhros pode ter viajado longe de onde ele roubou a Silmaril, e finalmente desistiu no local do Monte. Doom, é impossível dizer que isso não está certo.