This is the unmistakable, large waterfall at the far end of the lake (the leftmost and steepest flow).
8-10 screws for the route. V-threads and screws for anchor. There's a large boulder ~35 feet back and climber's right available for anchor backup. You need two ropes to rap/TR this route. A single 70m is not long enough by 30+ feet.
How do you get to it?