Roanoke County, Virginia

  • Area: 251 square miles
  • Population: 85,778 (2000 census)
  • Persons/Sq. Mile: 341.7
  • (Highest Density in SW Virginia)
  • % Karst Terrane: approx. 20%
  • Number of Reported Caves: 81
  • Surveyed Cave Passage: 5 miles
  • Longest Cave: 13,200 feet
  • Average Length: 337 feet
  • Deepest Cave: 350 feet

Major Karst Development Areas:

  • Roanoke Valley
  • Minor Valleys

Karstic Formations and Map Symbols:

  • Helderberg - DSu
  • Undivided Ordovician - Ou

Detailed Map - Click to View: