Q: In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
The Shenandoah River is formed northeast of Front Royal near Riverton, by the confluence of the South Fork and the North Fork. It flows northeast across Warren County, passing underneath Interstate 66 1 mile (1.6 km) from its formation. Beyond the I-66 bridge the river flows through a set of bends before turning to the northeast again, crossing into Clarke County 11 miles (18 km) below I-66. Five miles (8 km) downriver from the Clarke County border, the Shenandoah passes under U.S. Route 50 and then passes through a triple bend. 14.5 miles (23.3 km) below the Route 50 bridge, the river passes underneath State Route 7 and then continues northeast another 8 miles (13 km) where it crosses into Jefferson County in West Virginia, in the extreme eastern tip of the state. Once in West Virginia the river completes six large bends before joining with the Potomac from the southwest near Harpers Ferry. The confluence is on the West Virginia-Maryland border and 0.4 miles (0.64 km) from the Virginia-West Virginia border.
A:
where does the shenandoah river begin and end