Barring an experimental flow or monsoon rains, most trips experience “load following” releases, meaning the dam ramps up power production (thus water releases) on weekdays in the daytime, and ramps down at night and on weekends. The lowest water of the week is on Sundays. “Sunday water” is the main reason to check a calendar during a Grand Canyon trip. The pulses of water from daytime releases take time to travel downstream, and move at 3-5 miles per hour. This figure is approximate because the timing of the pulses depends on the size of the release and on how much water is already in the riverbed. If there is a higher base flow, a pulse will fill a pool and move through it faster. If the river has been running very low, then an additional release takes longer to fill the pools and move downstream. A word of encouragement: You will get the hang of it. When you land in camp, or stop for lunch, put a stick in the sand near the water line and see what it’s doing. As you move on downstream, keep track in your head of when the water last began to rise and fall, and then just add an hour or two to anticipate what is next. Sunday releases often cause no perceptible increase in flows, and the water may gradually fall for up to 24 hours as all the pools drain out. At Lee's Ferry the water will fall in the evening, and when you waken in the morning the boats will be beached UNLESS someone takes the time to push them out at night while the water is falling. The water at Lee’s rises mid-morning, so if you are not planning on an early start, you can just LET them get beached expecting that the water will be up again by the time you are ready to leave (unless the next day’s water to hit will be low “Sunday water”). At your next camp, the water will fall a little later, say in the wee hours, and rise later, say around lunchtime.