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Shenandoah National ParkKnow your City Club - group on a bus tour of Shenandoah National Park.
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Shenandoah National Park
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Learn about scientific research & natural resource stewardship in the park.
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Learn more about park resources in our fact sheet series.
Natural Resource Fact Sheets
Learn more about park resources in our fact sheet series.
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A hiker is dwarfed by the huge, round, lichen-covered boulders of Old Rag Mountain.  

Did You Know?
The large rounded boulders on the top of Old Rag, Shenandoah National Park’s most popular peak, were formed in place by chemical and physical weathering, called spheroidal weathering.

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Last Updated: January 11, 2008 at 12:42 EST