Mountain Adventurer 4000 Hiking Backpack




Incredible views and remote trails are just some of the rewards that await you when you’re hiking in the wilderness. And because hiking can push you to your limits, you need a backpack that can keep up with you and your latest adventure. The Mountain Adventurer 4000 Backpack was designed with you in mind. This extra-large, rugged backpack is fully adjustable, built for comfort and has plenty of room for all your gear.


-Ultralight 66 Liter Backpack
-Internal frame
-Exterior and interior gear loops
-Sleeping bag compartment
-Removeable hood
-Compression straps
-Neoprene sleeves for rope, etc.
-Lifetime Warranty

Specs and Sizing

Primary Features

Capacity: 4000 Cubic Inches / 66 Liters
Hydration Capacity: 101 Ounces (3 Liter), Bladder Not Included
Pack Weight: 5.25 lbs. (with tarp poncho), 4 lbs. (without tarp poncho)
Waist Belt: 33" - 48" with Split Wishbone Construction
Torso Length: Adjustable 15" - 20"


Shell: 420D Black Oxford 1000mm WR

Works Great With

ALTOS -10 Ultralight Down Mummy Bag

$299.99 View

ALTOS Sleeping Pad

$59.99 View

ALTOS-S 20 Ultralight Mummy Bag

$114.99 View

ComfortLite™ Organic Cotton Pillow

$22.99 View

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Lifetime Warranty

TETON Sports has one of the best product guarantees in the business, made possible by our low defect rate and extra-mile customer service policy.

Don’t Throw It Out!

Equipment broken? No need to fill up landfills with your favorite gear. There’s a good chance we can help you get it fixed!

Ask A Question!

Having trouble with something? Just want to let us know how much fun you’re having? We want to hear it!