Sure, several models will work for you. My first choice would likely be the MSR MiniWorks EX Microfilter ($80; www.msrcorp.com). Its been around in several models for more than a decade now and remains one of the better-designed water filters on the market. It screws onto a Nalgene bottle, for instance, which makes filling easier. Its water-pump-style handle is easier to manipulate than a push-pull type. Should you need to work on the filter, its easily disassembled. And as for filtering, the MiniWorks takes care of giardia, cryptosporidia, bacteria, and other protozoa. Plus its carbon core removes bad tastes in water, such as those from purifying agents. All in all, its an excellent filter for two or three people. If your group is bigger, then take a look at the MiniWorks bigger sibling, the WaterWorks EX Microfilter ($130).
MSR MiniWorks EX Microfilter
MiniWorks EX Microfilter
Depending on your budget and how much use you intend to get out of the filter, Katadyns Pocket Filter ($220; www.katadyn.com) is also worth a look. Its filtering capability is on par with the MSR models, but its made with an aluminum body for durability, and its ceramic filtering element is billed to clean 13,000 gallons. So its a filter for the long haul.
Have a great hike! Thats beautiful country.
Pick up a copy of the 2006 Outside Buyers Guide, on newsstands now, for a look at the best bike gear and 396 other torture-tested products.