• Area: 445 square miles
• Population: 12,926 (2000 census)
• Persons/Sq. Mile: 29.0 
• % Karst Terrane: approx. 30%
• Longest Cave: 38,353 feet
• Average Length: 673 feet
• Deepest Cave: 266 feet
• Number of Reported Caves: 175
• Surveyed Cave Passage: 22 miles

Major Karst Development Areas:

• Jackson River Valley
• Potts Creek Valley
• Warm Springs Valley

Karstic Formations and Map Symbols:

• Helderberg - DSu
• Undivided Ordovician - Ou

Detailed Map - Click to View:

• Alleghany County Map Alleghany County Map
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