The Beaumaris drains the whole of the Vaasan plateau and delivers that water through Bloodstone Pass to the River Goliad in Damara. It rises in the northwestern Earthspurs and runs across the bottom half of Vaasa, marking the northern edge of Sunderland, collecting run-off and meltwater as it goes.
South of Lake Midai, the flow is constant, fed by overflow from the lake, but to the north, its flow is variable. In the winter it is nearly dry and what little water it carries freezes regularly, but in spring and summer it becomes a torrent, before dying completely in the autumn. When the Great Glacier is melting in the spring, its smooth-flowing waters glisten dreamily under sun and moon and its revitalising taste is legendary.
For most of its length, it is broad and shallow, unsuitable for any but the smallest boats, and any silt it carries is deposited at intervals to create temporary fords and banks. The river is frequented by goblinoids and other monstrous inhabitants of the regions, so only the very hardy or very foolish follow it when travelling north of the Galenas.