Question: Which mountain range contains the highest rise of the Hazel River?

Related documents: [0]  [DOC] The Hazel River is a 47.8 mi tributary of the Rappahannock River in northern Virginia in the United States. Via the Rappahannock, it is part of the Chesapeake Bay watershed. It rises in Shenandoah National Park and flows generally eastwardly through Rappahannock and Culpeper counties. It joins the Rappahannock River from the west about 3 mi northwest of Remington. The Hazel's largest tributaries are the Hughes River, which joins it at the border of Rappahannock and Culpeper counties, and the Thornton River, which joins it in Culpeper County. [END] 
[1]  [DOC] Shenandoah National Park (often ) is a national park that encompasses part of the Blue Ridge Mountains in the U.S. state of Virginia. The park is long and narrow, with the broad Shenandoah River and Valley on the west side, and the rolling hills of the Virginia Piedmont on the east. Although the scenic Skyline Drive is likely the most prominent feature of the park, almost 40% of the land area 79579 acre has been designated as wilderness and is protected as part of the National Wilderness Preservation System. The highest peak is Hawksbill Mountain at 4051 ft . [END]  
Answer: the Blue Ridge Mountains
the Blue Ridge Mountains