..............................................The Woodward Dream Cruise is a celebration of that history and is the largest car cruise on the planet with more than a million people attending the fun.
Google "Woodward Avenue history" and get informed like any real car guy should be. Woodward plays just as big a role in American hot rodding history as Bonneville, the dry lakes of So-Cal, the Peterson Museum, flathead Fords and small block Chevys.
Oh, and to answer your question, Woodward starts in downtown Detroit and runs northwesterly about 20 miles or so ending up in Pontiac, MI.