uptheriver
adverbUK /ˌʌp ðə ˈrɪvə/
US /ˌʌp ðə ˈrɪvər/
Toward the place where a river starts.
We paddled uptheriver to find the waterfall.
OTHER MEANINGS
2. In the direction from the mouth toward the head of a river.
The salmon swam uptheriver to spawn.
3. Further along a river, away from where it meets the sea.
Their cabin is uptheriver, past the old bridge.
4. Against the flow of water.
The little boat moved slowly uptheriver.