U.S. Route 101 in California U.S. Route 101 ( US 101 ) in the state of California is one of the last remaining and longest U.S. Routes still active in the state , and the longest highway of any kind in California .
U.S. Route 101 in California In the U.S. state of California , U.S. Route 101 ( US 101 ) is one of the last remaining and longest U.S. Routes still active in the state , and the longest highway of any kind in California .