California State Route 151 (CA 151) is a short highway located in the state of California. It runs for approximately 2.5 miles, connecting the city of Santa Rosa to U.S. Route 101. The route primarily serves local traffic and provides access to various neighborhoods and businesses in the area. CA 151 is also known as Mendocino Avenue for most of its length. The highway features a mix of residential and commercial zones, making it an important thoroughfare for residents and visitors alike. Its relatively short distance makes it easy to navigate for those traveling within Sonoma County.