Mountain Adventurer4000 UltraLight Internal Frame Backpack

The TETON Sports Mountain Adventurer4000 is an ideal pack for weekend to multi-day trips in the backcountry, climbing or mountaineering, with plenty of space and ability to take you to the farthest reaches of the world. With endless options for pack configurations and usage, this pack offers great crossover through various outdoor sports without adding unnecessary weight or bulk.


The TETON Sports Mountain Adventurer 4000 is a lightweight but highly technical internal frame backpack that is ready for any type of mountain sport. It’s an ideal pack for backpacking or alpine climbs and every adventure in-between. The 66-Liter volume provides ample space for all your alpine equipment including skis, snowboard, or snowshoes. The strong and rugged pack shell is made from a treated 420D Oxford, which can stand up to even the roughest terrain in the most extreme parts of the world.

Oversized zipper pulls on the exterior pockets and main compartment zipper are easy to use even with gloved fingers. The Mountain Adventurer 4000 provides superior comfort and a precise fit with the help of tension adjustments at the shoulders, chest, and torso. Aluminum stays provide strength and support right where you need it. The dual waist belt has wishbone construction to sit comfortably on your hips. A thickly padded lumbar area provides exceptional lower back comfort.

Other comfort features include thick shoulder pads and air channels along your back to maximize air circulation. The Mountain Adventurer 4000 is also hydration compatible with an integrated Velcro hang tab for easily hanging your hydration bladder. Room enough for a large 3-Liter bladder. Bonus features include: Two mesh pockets, to fit water bottles or other items requiring easy accessibility, multiple side compression straps, and an upper compression strap help keep your backpacking gear cinched tight to reduce pack shift.

  • ONE BACKPACK FOR EVERY ADVENTURE: Pack your snowboard, skis, climbing rope, snowshoes, or backpacking gear in and on this pack; This pack is ready for hiking, backpacking, travel, hunting, and camping; Rain or shine
  • FITS TO YOUR SHAPE: Extra padded split dual wishbone waist pad with independent top and bottom hip and torso adjustments offer a perfect customizable fit; Unique lumbar adjustment only seen in higher-end packs; Travel backpack for men, women, or youth
  • DURABLE: Black Oxford shell for added strength is perfect for the most rugged adventures; Multiple compression straps come with strong buckles for balancing your pack comfortably; Storm-proof zippers keep your gear dry and secure
  • ADDED COMFORT AND SUPPORT: Lightweight aluminum frame provides stability, so you feel less of the load; Extra padded lumbar region is comfortable on your back; Designed for the most aggressive users at a price that is friendly to beginners
  • TETON SPORTS PROMISE: Reach out to our AMAZING customer service team if you have any questions or concerns; YOU CAN COUNT ON US to get you taken care of and back OUTDOORS with TETON Sports

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