Impassable 20L

Lightweight daypack for hiking and exploring

Big Agnes daypacks are built for extended day hikes, lightweight excursions, and everyday use. The Impassable 20L pack includes comfort features from top to bottom with a compression molded back panel, contoured shoulder straps, and a foam padded hip belt. Streamlined for exploring in comfort using ultralight sustainable materials with technical features from top to bottom, the Impassable 20L top-loading pack has plenty of everyday storage options that won’t weigh you down.
100% Guarantee


Our top priority is to provide customer service as stellar as the award-winning products we create. If one of our products does not perform to your satisfaction, contact our customer service team and we will help you find gear that fits your needs.

Lined Laptop Pocket

Compartmentalized storage includes padded side pocket that fits up to 15” / 38cm laptop with safe-carry mesh floor or a 2L hydration bladder pocket.

Trash Can Pack Accessory

Help keep our wild spaces trash-free with the Trash Can pack accessory. Lightweight and durable, this stuff sack accessory easily attaches to your pack to make stashing trash easy while on the move. A portion of Trash Can sales support Leave No Trace™️ Center for Outdoor Ethics. #packitoutwithbigagnes

Shop The Trash Can

Specs + Sizing


20L daypack with a unisex fit for versatility on and off the trail, streamlined for all-day comfort 

Comfort and support through contoured, anatomically curved back panel with body mapped foam for a precise fit with ventilation 

Secure, comfort fit with articulated Open Range Hip Belt, providing stability with flexibility 

Contoured shoulder straps with adjustable sternum strap 

Compress pack volume as needed with adjustable side webbing 

Top-loading access with zip closure 

Internal 2L hydration bladder pocket with bladder hook, discreet tube routing port, and hose keeper clip on sternum strap 

Compartmentalized storage includes: padded side pocket that fits up to 15” / 38cm laptop with safe-carry mesh floor, 2L hydration bladder pocket, two stretch mesh side pockets, front quick-stash pocket, two zip pockets, one with key keeper, and internal organization pocket 

Stash trekking poles on pack exterior using webbing and bungee cord loops. Also features daisy chain loops on pack exterior for extras 

Top grab handle for easy movability 

Accessory rain cover and 7L Trash Can for collecting day trash and trail litter - sold separately

Construction + Materials

Puncture and tear resistant material is made with GRS certified, recycled high-tenacity Mipan® regen robic nylon featuring a solution-dyed ripstop grid and UTS environmentally sustainable coating 

Heavy duty twill fabric bottom for maximum reinforcement and increased durability 

Nylon taffeta lining 

Non-stretchy, semi-transparent interior pocket mesh for optimal organization 

Stretchy, fine woven, anti-snag exterior pocket mesh 

Stretch woven fabric on shoulder straps, hip belt, and back panel provide maximum comfort against the body

Here’s what other people think.

What’s in a Name?

Nestled between the peaks of Mount Pau and Mount Candy north of Steamboat lies impossibly steep Impassable canyon. Although the mouth of the canyon is relatively easily accessible, the ravine carved by South Franz Creek is densely vegetated and steep enough that early pioneers had to find alternate routes through the area.