The Maerwyn Mountains
- A mountain range in the Mostreve Hills, Greater Sembara
The Maerwyn Mountains are a line of high peaks in the Mostreve Hills, running northwest along the border between Addermarch and Tyrwingha. They rise from the rough country near the Valenfray Hills and trend north toward the Enst river valley; and are highest in the south near the headwaters of the Branth.