In Norse mythology, Thund is the river that flows past Valhalla’s gate.
The river appears in Grímnismál, a poem in the Poetic Edda. In Odin’s description of Valhalla, its gate is associated with Thund, which is listed among the obstacles surrounding the hall. The poem presents Valhalla as a fortified destination reached by the chosen dead and inhabited by the einherjar.
Thund is easy to confuse with Gjöll, the river associated with the route toward Hel and the bridge Gjallarbrú. It is also distinct from Ifing, the river described as separating the lands of the gods and giants. English translations may vary in spelling because the original Old Norse name is Þund.
Valhalla’s river detail comes from medieval poetic mythology rather than a single unified Norse canon. The surviving Eddic poems were written down in Iceland centuries after the pagan period, so translators sometimes differ in wording and interpretation.