eofelis 

On long stretches between spots of civilization, where do you get water if you run out?

I've only done a few small tours (but hoping to more this summer) and we have been successful in asking motorists if they have any extra water with them. We have also stopped at houses and asked.

One time in a "remote" area on Hwy 92 between Gunnison and Montrose, CO we had to camp at a rest area overlooking the Morrow Point Reservior. One guy gave us a gallon of water, explaining that someone had helped him out when his vehicle broke down a few days ago, and now it was his turn to help someone out.

Another time we were touring in Island in the Sky, Canyonlands National Park, and a guy pulled over and offered us water.

Does anyone take a water filter along?

We want to tour the San Jauns this summer, but we know that some of the water in the area there is affected by mining runoff and may not be worth filtering. It would be heavy to carry a lot of water over those big passes....