The Los Angeles River Bike Ride is this Sunday. There are three routes: a Kid's Ride, a 15 Mile Family Ride, and a 70 Mile River Ride. The last ride goes from Griffith Park to Long Beach and back; about 2/3 of the route is along the river. I might do that, although I don't know if I'll do the whole thing. I'll also probably bring my camera with me. I might take the train back