We hit the trail head at 10:30. It took us only 50 minutes (including dinking around taking pictures) to get to the Ledge. While the temp was about 83 degrees, we were in shade untill we reached the top AND there was a cooling breeze and no humidity. Don't ask me why it is called Rattlesnake Lake/Ledge/Mount. As far as I have been informed there are no rattlesnakes west of the mountains and this place is a mere 45 minute drive east of Seattle on I 90. I certainly didn't see any snakes, only a flock of Canada geese. Ah ha! I just investigated the origins of the lake's name and I found my answer here.