State Route 877 (SR 877) is a state highway in rural Washoe County, Nevada. It runs along Franktown Road in the western reaches of the Washoe Valley.

SR 877 begins in the Washoe Valley 2.0 miles (3.2 km) north of the Carson City–Washoe County line, at the intersection of Bowers Mansion Road (SR 429/Old U.S. Route 395) and Franktown Road. From there, the route follows Franktown Road west and then north for about 4.3 miles (6.9 km) through the eastern foothills of the Carson Range on the western side of the Washoe Valley. Franktown Road comes to an end at a second intersection with SR 429, just south of Bowers Mansion.

According to Deke Castleman, author of the Nevada Handbook (Moon Publications), "this few-mile drive along Franktown Road is one of the state's prettiest scenic valley and foothill stretches of road."

The entire route is in Washoe County.