Best Backpacking Water Filters of 2025

Everyone exploring the backcountry needs water, but staying hydrated is not as simple as drinking straight from streams and lakes. To protect against protozoa, bacteria, and even viruses, there are myriad water filtration and purification systems built specifically for backpacking (many options on this list are great for day hiking, trail running, and travel, too). We've been testing water filters on backcountry adventures near and far since 2018, and our 19 current favorites below include everything from ultralight squeeze filters and chemical drops to pumps and large-quantity gravity filters. For more background information, see our comparison table and buying advice below the picks, along with details about our testing process.

Continue reading to learn more about the best water filters, written by Maddie Downie.

写真サムネイル ブログ執筆者
Senior Editor (Former)
Jenny Abegg and Maddie Downie

Jenny Abegg
Expertise & Background
Topics of Expertise: Climbing, mountaineering, trail running, hiking and backpacking, backcountry skiing
Education: Masters in Education
Years of Writing: 9
Years of Gear Testing: 9
Certifications: PCGI certified Lead Guide
Club or Association Memberships: American Alpine Club, Access Fund, Austrian Alpine Club
Previous Publications: Climbing Magazine, Alpinist, Sidetracked, Adventure Journal, REI Co-op Journal

メディア

Clothing and gear can be treated with a 0.5% permethrin spray, sold under names including Sawyer, Insect Shield and Ranger Ready.

Bay Area News Group
News Group

メディア

Sawyer’s picaridin lotion offers the longest protection windows on test — up to 14 hours against mosquitoes and ticks — and its creamy, low-odor formula goes on smooth and dries quickly.

Rachel Cavanaugh
ライター

メディア

The Sawyer Squeeze and Cnoc Vecto made hydration easy.

Josh King
寄稿ライター