The Thomas Guide—Street Guide: Los Angeles and Orange Counties (any recent year), page 630 Professional Review and Guide
"“Topanga to Tuna to Tide” refers to three of the route’s main features: Topanga Canyon Boulevard, Old Topanga Canyon Road, and the community of Topanga; Tuna Canyon Road; and the tide, since the ride starts and finishes along the beach. The route is one of the most scenic in this book; but it is not easy, with three significant climbs and one steep descent along the way.
It is a 38.2-mile figure-8 route with two loops crisscrossing in Fernwood, plus an out-and- back segment along the beach. With oceanfront and mountain riding, a quiet back road, and spectacular ocean views, this may be the consummate L.A. bike ride!"