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Around mile 3 is when you start to really appreciate—or think about replacing—your gear. Tough, breathable and stretchy, the men's 30 in. inseam REI Co-op Activator 3.0 pants are definitely keepers.

Around mile 3 is when you start to really appreciate—or think about replacing—your gear. Tough, breathable and stretchy, the men's 32" inseam REI Co-op Activator 3.0 pants are definitely keepers.

Around mile 3 is when you start to really appreciate—or think about replacing—your gear. Tough, breathable and stretchy, the men's 34" inseam REI Co-op Activator 3.0 pants are definitely keepers.

What's your perfect pair of trail pants? Wind- and water repellent? Breathable and stretchy? Plenty of secure pockets? That's the women's REI Co-op Activator 3.0 pants!

Pants you can trust on a long trail need to breathe, stretch, repel wind and water, and keep your phone and trail snacks handy and secure. Meet the women's REI Co-op Activator 3.0 pants.

You can trust the women's REI Co-op Activator 3.0 pants to make long trail days comfortable—they breathe, stretch, repel wind and water, and keep your phone and trail snacks handy and secure.

The further you get from the trailhead, the more you'll love the the women's REI Co-op Activator 3.0 pants—they breathe, stretch, repel wind and water, and keep your phone and snacks handy and secure.

Lightweight, soft-shell pants designed for comfort under a harness, the men's Patagonia Altvia Alpine pants balance durability and mobility to keep you moving on long alpine days above the tree line.

Made for on-mountain movement, the men's Ortovox Bacun pants offer comfort, breathability and moisture management with a high-tech fabric pairing a protective soft shell and next-to-skin merino wool.

With a workwear-influenced design and a weather-resistant fabrication, The North Face Camden women's soft-shell pants are up for just about anything you put your mind and body to.

Ruggedly built with excellent stretch and mobility for climbing or backpacking, the men's Mountain Hardwear Chockstone Alpine pants excel at long days in your harness or under your pack on the trail.

Built for the 4-season athlete, the men's Outdoor Research Cirque II pants feature a harness-compatible waist and weather-resistant fabric to aid all the objectives on your winter climbing checklist.

With a harness-compatible waist and weather-resistant fabric, the women's Outdoor Research Cirque II pants help 4-season athletes meet every objective on their winter climbing tick list.

With their light weight for the approach, durability for the climb and warmth for the summit, the men's Outdoor Research Cirque Lite pants are designed with spring-to-fall alpine adventures in mind.