where does the boise river start and end
Boise River The Boise River is a 102-mile-long (164 km)[2] tributary of the Snake River in the northwestern United States. It drains a rugged portion of the Sawtooth Range in southwestern Idaho northeast of Boise, as well as part of the western Snake River Plain. The watershed encompasses approximately 4,100 square miles (11,000 km2) of highly diverse habitats, including alpine canyons, forest, rangeland, agricultural lands, and urban areas.
Danube Classified as an international waterway, it originates in the town of Donaueschingen, in the Black Forest of Germany, at the confluence of the rivers Brigach and Breg. The Danube then flows southeast for about 2,800 km (1,700 mi), passing through four capital cities before emptying into the Black Sea via the Danube Delta in Romania and Ukraine.