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Old Rag Mountain is a
mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually highe ...
near Sperryville in Madison County,
Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...
. A part of the
Blue Ridge Mountains The Blue Ridge Mountains are a Physiographic regions of the world, physiographic province of the larger Appalachian Mountains range. The mountain range is located in the Eastern United States, and extends 550 miles southwest from southern Pennsy ...
, the peak is located within
Shenandoah National Park Shenandoah National Park (often ) is an American national park that encompasses part of the Blue Ridge Mountains in the Commonwealth of Virginia. The park is long and narrow, with the Shenandoah River and its broad valley to the west, and the ...
and is the most popular
hiking Hiking is a long, vigorous walk, usually on trails or footpaths in the countryside. Walking for pleasure developed in Europe during the eighteenth century.AMATO, JOSEPH A. "Mind over Foot: Romantic Walking and Rambling." In ''On Foot: A Histor ...
destination within the park. In contrast to most mountains of the Blue Ridge, Old Rag has an exposed (rocky) summit.


Geology

Old Rag Mountain is underlain by Old Rag Granite, named for its ubiquitous exposure on the mountain, formed during the
Grenville Orogeny The Grenville orogeny was a long-lived Mesoproterozoic mountain-building event associated with the assembly of the supercontinent Rodinia. Its record is a prominent orogenic belt which spans a significant portion of the North American continent, f ...
about a billion years ago. About 400 million years after the Grenville orogeny during the
Catoctin Formation The Catoctin Formation is a geologic formation that expands through Virginia, Maryland, and Pennsylvania. It dates back to the Precambrian and is closely associated with the Harpers Formation, Weverton Formation, and the Loudoun Formation. The ...
, deposition of basaltic magma occurred during the formation of the Iapetus Ocean, forming a layer of greenstone over the granite. This was followed by the Weverton Formation, Harpers Formation, and Antietam formation in which sand and rock sedimented on the ocean floor forming
quartzite Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tec ...
and
sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates ...
deposits. Finally a period of sedimentation of shells and skeletons of
foraminifera Foraminifera (; Latin for "hole bearers"; informally called "forams") are single-celled organisms, members of a phylum or class of amoeboid protists characterized by streaming granular ectoplasm for catching food and other uses; and commonly ...
resulted in deposition of a layer of
limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms whe ...
. Approximately 700 million years after the Grenville Orogeny, the Iapetus Ocean began to close resulting in the
Alleghenian Orogeny The Alleghanian orogeny or Appalachian orogeny is one of the geological mountain-forming events that formed the Appalachian Mountains and Allegheny Mountains. The term and spelling Alleghany orogeny was originally proposed by H.P. Woodward in 195 ...
when the Old Rag Granite and layers of rock deposited upon it were transported westward and eventually thrust up over the limestone bed around it, forming Old Rag and the Blue Ridge Mountains.


Recreation


Hiking

The summit of Old Rag is accessible via a system of trails in Shenandoah National Park. The shorter, most common way is from a parking area in Nethers near the end of Madison County's SR 601, off
Virginia State Route 231 State Route 231 (SR 231) is a primary state highway in the U.S. state of Virginia. The state highway runs from SR 22 in Cismont north to U.S. Route 522 (US 522) near Sperryville. SR 231 forms part of the connection between Charlottesville an ...
, at the base of the mountain. A circuit hike or a out-and-back hike to the summit can be made. The circuit hike makes use of the ''Ridge Trail'' which ascends the mountain to the first false summit. The trail then turns into a rock scramble, which can be strenuous for inexperienced hikers, for to the summit and intersection with the ''Saddle Trail'' which descends down the saddle of the ridge past Byrds Nest #1 shelter and Old Rag shelter to the junction with ''Weakley Hollow Fire Road''. The Fire Road then descends to the Old Rag parking area. The upper Old Rag parking area was closed to public vehicles in 2010. Parking is now limited to the lower field parking area, adding a walk on asphalt. The summit can also be reached from
Skyline Drive Skyline Drive is a National Parkway that runs the entire length of the National Park Service's Shenandoah National Park in the Blue Ridge Mountains of Virginia, generally along the ridge of the mountains. The drive's northern terminus is a ...
by following ''Old Rag Fire Road'' from the drive at milepost 43 to its eastern terminus with the ''Saddle Trail'' and then follow that trail to the summit.


Rock climbing

Old Rag is a unique destination for rock climbing in the mid-Atlantic region. Its large granite exposures offer rock climbers an experience similar to that provided by the granite rocks of the Sierra Nevada, Yosemite,
North Carolina North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and ...
, and
New Hampshire New Hampshire is a state in the New England region of the northeastern United States. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Gulf of Maine to the east, and the Canadian province of Quebec to the nor ...
. It boasts splitter cracks, dihedrals, and crystal pinching slabs. The climbs are between in length, and range in difficulty from beginner to expert (5.4- to 5.12+ on the
Yosemite Decimal System The Yosemite Decimal System (YDS) is a three-part system used for rating the difficulty of walks, hikes, and climbs, primarily used by mountaineers in the United States and Canada. It was first devised by members of the Sierra Club in Southern Cal ...
).


Bouldering

Old Rag has a rather underdeveloped
bouldering Bouldering is a form of free climbing that is performed on small rock formations or artificial rock walls without the use of ropes or harnesses. While bouldering can be done without any equipment, most climbers use climbing shoes to help se ...
section. However, because Old Rag has an exposed surface, bouldering challenges exist all along the trail.


References


External links

* * * * {{Mountains of Virginia Mountains of Shenandoah National Park Blue Ridge Mountains Mountains of Madison County, Virginia Tourist attractions in Madison County, Virginia