You skirt the supertankers and loading towers on the Oakland estuary when you sign up for one of Stacked Adventures Oakland Estuary Tours. There is a frequent schedule of safe sea kayaking adventures departing from Alameda including sunset tours, wildlife tours, bird tours, family tours and dinner tours. The groups are small, the timing is just a few hours and prices range from $65 to $100 per person. Children over 12 welcome. It is part of a larger organization that offers adventures across the continent’s wild rivers, even canoeing across the country.