• Area: 388 square miles
• Population: 83,629 (2000 census)
• Persons/Sq. Mile: 215.5
• (2nd Highest Density in SW Virginia)
• % Karst Terrane: approx. 40%
• Longest Cave: 5,400 feet
• Average Length: 195 feet
• Deepest Cave: 120 feet

Major Karst Development Areas:

• Blacksburg Karst Plateau
• New River Valley
• Ellett Valley

Karstic Formations and Map Symbols:

• Undivided Ordovician - Ou
• Elbrook - Ce 
• Number of Reported Caves: 79
• Surveyed Cave Passage: 3 miles

Detailed Map - Click to View:

• Montgomery County Map Montgomery County Map
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