Lewis and Clark County, Montana: History
== Geography ==
According to the United States Census Bureau, the county has a total area of 3,498 square miles (9,060 km2), of which 3,459 square miles (8,960 km2) is land and 39 square miles (100 km2) (1.1%) is water.
==== Cities ====
Helena (county seat)
East Helena
==== Other unincorporated communities ====
I-15
US 12
US 287
MT 21
MT 200
=== National protected areas ===