sometimes yes
the Rocky Mountains
Most river sources are from mountains
Usually snow melt from mountains at the beginning of the river.
Rivers' sources are the mountains, more from the glaciers that are still on the mountains than from the mountains themselves.
The two rivers the originate in the Kunlun Mountains are the Huang Heand the Yangtze River
There are no mountains near the Nile River.
The snowpacks of the Sierra Nevada Mountains
The Mississippi River is west from the Rocky Mountains. The Rocky Mountains are on the western coast of the USA, and the Mississippi river is in the middle of the USA. Therefore, the Mississippi River is west from the Rocky Mountains.
They originated in the Himalayan mountains.
The River Tweed is 97 miles long and, no it does not have mountains in it.
The Congo river does not start in the Rocky Mountains.
The Kennebec River