Sign for SR 766 on SR 221. No signage for SR 766 exists along the route itself.
State Route 766 begins in the center of Carlin in Elko County, at an intersection with 10th Street and Chestnut Street (Interstate 80 Business/SR 221). From there, the route heads northward along 10th Street, which becomes Newmont Mine Road. SR passes over Interstate 80 and then heads out of Carlin. The route passes by some light industrial and agricultural areas as it heads north-northwest. SR 766 begins to parallel Maggie Creek on its journey northward. After about 5 miles (8.0 km), the route crosses into Eureka County. The route travels another approximately 6 miles (9.7 km) before coming to its terminus just north of the turnoff to Newmont Mine.