State Route 156 (SR 156), also known as Lee Canyon Road, is a state highway in Clark County, Nevada. The road is one of two highways connecting U.S. Route 95 (US 95) to the Humboldt-Toiyabe National Forest and Spring Mountains area northwest of Las Vegas, and its entire length is designated a Nevada Scenic Byway.When first created in the 1930s, the highway followed a slightly different path that formed State Route 52.