Figuring out the exact distance to your target can be tricky once you begin to factor in elevation change and wind. Not to mention the distance you can hit your ball can very greatly depending on temperature, altitude, roll, etc.
The easier approach, especially for amateurs, is figuring out how far you need to hit it, and where you can't afford to hit it. While PGA Tour Pros have their distances finely tuned, the rest of us don't hit 9.8 out of 10 pure shots.
Looking at the diagram, we can formulate a simple approach to distance. From the Tee Box, it's 250 yards to the bend, so hit it less than that. Then, you'll want to lay up to the end of the fairway - no less than 120 from the green. After that, long is better than short, so take an extra club to clear the water.
Keeping it simple will save you a lot of strokes over the long run!