Route description

SR 166 starts at U.S. Route 93

U.S. Route 93 in Nevada

In the U.S. state of Nevada, U.S. Route 93 is a major U.S. highway traversing the eastern edge of the state. The highway connects the Las Vegas area to the Great Basin National Park, and provides further connections to Ely and Wells...

 near Boulder City inside the Lake Mead National Recreation Area

Lake Mead National Recreation Area

Lake Mead National Recreation Area is located in southern Nevada and northwestern Arizona. The centerpieces of the National Recreation Area are its two large reservoirs: Lake Mead and Lake Mohave. These lakes cater to boaters, swimmers, sunbathers, and fishermen while the surrounding desert rewards...

. The road goes north along Lake Mead's shore. It quickly encounters a toll booth where motorists pay to enter the Recreation Area. Several roads branch off SR 166 and lead to marinas. Near the end of its route, the road turns west before meeting SR 564

Nevada State Route 564

State Route 564 is an east–west highway in Henderson, Nevada connecting the southern Las Vegas area to Lake Mead. The route is known as Lake Mead Parkway.-Route description:...

 and SR 147

Nevada State Route 147

State Route 147 is a short distance state highway located southern Nevada. It is signed as Lake Mead Boulevard and runs from Interstate 15 in North Las Vegas east to the border of the Lake Mead National Recreation Area....

at its northern terminus.

History

Signage for the route was removed by 2000, and according to a park ranger, the route is a park service road, and the signs were only put up to "make it easier for tourists."