Quailman wrote:ThunderingWind wrote:I am one of those depending on where I am at. If I am down stream of cattle by less than 100 miles, I will filter and chemically treat. I am up in elevation then I just filter by various filters.
You do realize, don't you, that grazing rights to nearly every acre of public land are leased to ranchers. I've seen sheep straddling the Continental Divide in the Rio Grande National Forest. And if there aren't livestock there are probably elk or bighorn sheep, though cattle are probably the grossest in terms of fouling the water. People take horses a lot of places too.
Sorry, I did not make myself clearer. By my post, I meant knowingly downstream of know cattle operations. I am not worried about the deer, elk etc...just the major ranching operations.
I check with the USDA leasing office, Dept of Interior, and local Ag Office before I venture too far out. I then plot any available electronic data to my electronic topo map and plan my trip accordingly. I have even gone so far as to plot the map using a CNC machine and made a terrian model for some of my tougher hikes so I can really visualize the terrain and plan the alternative routes, evac points, etc...