The answer given was "That's for environmental reasons". Apparently, they expect full coverage on the mountain until that date and after that, we become a nuisance and an environmental disruption...so you guys still coming down? There's only one sign and nothing on their website saying anything about it. If we went out of Marble, we would never know about this "rule" Called the Cowlitz ranger station and they knew nothing about it.
...and of course climbers don't have any environmental effect
...and of course climbers don't have any environmental effect