Water on public land — and why you never trust it
Out here, water — fresh or grey — is what ends most trips before anything else does. It's also the thing people get wrong the fastest, because a creek looks clean and a map has a little blue mark on it. Neither one is a promise. Here's how to think about it.
Water is usually what sends you to town
Whatever your rig, something water-related tends to decide your last day — the fresh you carry, or the grey you can't dump. That's the whole idea behind the camp card: figure out which one gives out first for your setup, ration to it from day one, and plan the town run around that window instead of hoping.
The blue "W" is a claim, not a creek
On a camp's services map, the nearest Water pin is a spot someone marked as drinking water in OpenStreetMap — a spigot, a campground tap, sometimes a park fountain or an odd source that got tagged that way. It's a claim on a map, not a creek we surveyed, and it's the nearest one in a straight line, not a drive we've checked for you. Sometimes it's a real fill point you can load jugs from; sometimes it's a bubbler you can't, or a tap that's winterized, shut off, or just plain wrong. Treat it as a lead to confirm, not water in the bank.
Every natural source gets treated. No exceptions.
A creek beside camp, a spring, a stock tank — clear and cold tells you nothing. Giardia and Cryptosporidium don't change how the water looks, and the animals and cattle upstream aren't careful. We never call natural water potable anywhere on this site, and you shouldn't either. Boil it, filter it, or treat it with chemicals — every single time, no matter how good it looks.
Know what each method actually does
They aren't interchangeable. Boiling is the surest — a rolling boil for one minute, or three minutes above about 6,500 feet, per the CDC. A backcountry filter around 0.2 micron handles protozoa and bacteria but does not catch viruses. Chlorine dioxide drops kill the pathogens that matter out here, but they need time — up to four hours on Crypto in cold water. Match the method to the source, and read the directions on your gear, not the marketing.
Carry more than you think — and don't forget the grey half
A rough rule to plan against: figure roughly a gallon per person per day for drinking and cooking, and more in heat or at altitude. Top off in town before the source you were counting on turns out dry. And remember fresh water is only half the clock — a full grey tank you can't legally dump ends the stay just as fast as an empty fresh one, so ration both.
A source on a map is a season out of date
Streams shrink, springs quit, stock tanks go dry or freeze over, and spigots get shut off for winter. A pin — ours or anyone's — shows where water was, not whether it's flowing today. Carry a backup source and enough range in the tank to reach town before a dry creek becomes your problem instead of a footnote.
None of this is hard. It's just refusing to trust water you haven't treated and a mark you haven't confirmed — which, out here, is most of staying healthy.