The ferry we took from La Paz to Mazatlan only rides on Tuesdays, Thursdays and Sundays. It departs La Paz at 5pm to arrive the next day at 11am. The price 2006.80 Pesos for the bike plus 1102.00 Pesos for the rider includes dinner and breakfast as well as a spot on reclinable plane type chair. While attempting to spend 18hrs in it is possible, we would recommend investing an extra 787.64 Pesos in a cabin for up to 4 people. You will be glad you did.