Louisiana Highway 66

Louisiana Highway 66
Tunica Trace
Route of LA 66 highlighted in red
Route information
Maintained by Louisiana DOTD
Length	19.620 mi[1] (31.575 km)
Existed	1955 renumbering–present
Tourist routes	Louisiana Scenic Byway: Tunica Trace Byway
Major junctions
West end	Begin state maintenance at Louisiana State Penitentiary in Angola
East end	US 61 north of St. Francisville
Location
Country	United States
State	Louisiana
Parishes	West Feliciana
Highway system
Louisiana State Highway System Interstate US State Scenic
← US 65 → LA 67
← SR 123 SR 124 → SR 125

Louisiana Highway 66 (LA 66) is a state highway located in southeastern Louisiana. It runs 19.62 miles (31.58 km) in a general east–west direction from the main entrance of the Louisiana State Penitentiary at Angola to a junction with U.S. Highway 61 (US 61) north of St. Francisville.

LA 66 winds through the scenic Tunica Hills of West Feliciana Parish and connects the prison facility with US 61, the main highway through the area. It is also steeped in history as the route is derived from an ancient Native American portage known as the Tunica Trace. The surrounding area contains burial mounds and other artifacts recalling this heritage. More recent historical sites include the antebellum Trudeau plantation located on the former site of a Tunica Indian village.

Several small rural communities are also located along LA 66, including Tunica, Retreat, and Weyanoke. LA 66 was designated in the 1955 Louisiana Highway renumbering, replacing former State Route 124. The route is also designated as the Tunica Trace Byway in the state's system of tourist routes known as the Louisiana Scenic Byways.