Under the best case scenario, the Mt. Whitney trails will open after July 2. I have a day use permit for July 3, so it's certainly possible that I'll be one of the first people this year to be going up the Main Trail beyond Lone Pine Lake.
If that really does become the case, would the water sources above Lone Pine Lake be safe to drink without filtering? The odds of finding a WAG bag in or near, say, Trail Camp Pond would be extremely slim, but would pollution from non-human sources be an issue? I mean, I wouldn't want to be drinking unfiltered water that has marmot poop in it!
