Geography
Comal County Straddles the Hill Country and the Plains
Comal County covers 555 square miles where the Texas Hill Country meets the Blackland Prairies, giving it varied terrain and soils.
The county spans the transition zone between the limestone Hill Country to the west and the flat Blackland Prairies to the east. Elevations range from about 600 to 1,500 feet. The Guadalupe River and Canyon Lake are its main water features.
This geography means different parts of the county have different soil types, flood risk, and well-water conditions. Land in the Hill Country portion tends to be rocky with shallower soil. The prairie side has deeper, darker soil. This affects what grows, how wells behave, and how land is valued for agriculture.
Source to confirm: Handbook of Texas – Comal County