The Stone Glacier Chilkoot 0° sleeping bag offers an excellent blend of warmth, comfort, and packability for cold-weather backpacking trips. It proved to be a dependable choice for backcountry hunters and outdoor enthusiasts alike. I put this bag through its paces on a week-long elk hunt in Colorado and a two-night camping trip to Caprock Canyon State Park. It performed well in both scenarios, but let’s dive into the specifics of this ultralight sleeping bag and why it is worth your consideration. 

Stone Glacier Chilkoot 0° Specifications:

• Weight: 2 lbs. 10 oz.
• Shoulder Width: 32″
• Hip Width: 24″
• Foot Box Width: 18″
• Shell Material: 15 Denier Pertex® Quantum
• Insulation: 850+ Fill Power HyperDRY™ 90/10 Grey Goose Down
• Down Insulation Weight: 29.1 oz.
• Construction: Complex Differential Cut
• Baffle Design: Vertical Pintucked Baffles
• Footbox: Articulated Footbox
• Neck Seal: Unique Neck Baffle Seal System
• Zipper: No Stick Zipper
• Included Accessories: Storage Sack and Stuff Sack
• Maximum User Height: Fits up to 6’ 5” tall
• Compressed Size: 8.5″ x 17.5″

Packability and Weight

At just 2 lbs. 10 oz., the Chilkoot 0° bag strikes an excellent balance between weight and warmth, making it an ideal choice for extended backpacking trips. When compressed to 8.5″ x 17.5″, it’s roughly the size of two Nalgene bottles. This compact size made it easy to pack into my Mystery Ranch Metcalf 75, alongside my sleeping pad, tent, and five days’ worth of food and gear.

Among the items I packed was one of Stone Glacier’s Nalgene bottles. In the past, I’ve boiled water and placed it in a Nalgene bottle at my feet in my sleeping bag to keep my feet warm overnight. While the Chilkoot kept me plenty warm without needing this remedy, I still like to carry a Nalgene bottle for this reason, even though I rely on a HydraPak for most of my water storage.

The Chilkoot also includes a long-term storage sack, designed to prevent the down insulation from being permanently compressed. While it’s easy to pack down for trips, Stone Glacier advises against storing it compressed for extended periods or when damp. The storage sack works well for maintaining the bag’s loft, though it does take up a noticeable amount of space in my closet.

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Chilkoot 0° Real-World Testing

On my Colorado hunt, temperatures dipped into the 20s at night. Wearing only my underwear for a few of these nights, I stayed warm and comfortable. On the nights I added a T-shirt and thermal pants, I woke up sweating and had to vent the bag to regulate the temperature. My past experiences with budget sleeping bags often left me shivering, particularly with frozen feet on colder nights. However, the Chilkoot 0° bag kept my entire body—including my toes—warm, no small feat given my 6’2″ frame and less-than-stellar blood circulation.’

The Chilkoot’s impressive warmth can be credited to its 850+ fill power HyperDRY™ goose down insulation. It performed exceptionally well even in sub-freezing conditions. The 15 Denier Pertex® Quantum shell provided reliable wind and water resistance as well. I encountered no issues with moisture or condensation compromising the loft. Some of the nights had wind gusts up to 40mph but between my tent and the shell of this sleeping bag, I never even felt breezy. 

During a trip to Caprock Canyon, where lows hovered around 40°F, the bag almost felt too warm. Thankfully, the side zipper vent system came in handy, allowing me to release excess heat effectively. This feature proved especially valuable in warmer-than-expected conditions, which can sometimes make a 0° bag seem like overkill. That said, I’d much rather have a bag that’s too warm and adjustable than one that leaves me cold and uncomfortable.

Comfort and Fit

The interior space of the Chilkoot is a standout feature. With a shoulder width of 32″, a hip-width of 24″, and an 18″ foot box, there’s enough room for side sleepers or larger individuals to shift positions without feeling constricted. Many ultralight bags sacrifice interior space to cut weight, but the Chilkoot strikes a good balance here, especially for hunters. The fabric feels soft and pleasant against the skin, and the articulated hood with its insulated neck cuff seals heat effectively. However, the single height option (up to 6’5”) may feel excessive for shorter individuals, and more length options would be appreciated by many. 

Even at 6’2″ I had some wiggle room. I am also a side sleeper and had no issues rotating around and finding plenty of warm comfortable positions to fall asleep in. One thing I did have trouble with was finding the zipper when it was fully zipped up in the middle of the night. The bag sort of rotated around on me. Due to the double-sided zipper though, I was able to find the pull string on the inside and open it back up.

Chilkoot 0° Bag Hood

The hood of the Chilkoot sleeping bag is generously sized, providing ample room. It’s plush enough to double as a pillow. I found adding a hoodie underneath gave it extra padding and support for a better night’s sleep. The hood also features an insulated neck cuff with a magnetic closure. This effectively seals in heat and prevents drafts on cold nights. For particularly frigid conditions, two adjustable pull tabs allow you to snugly close the hood around your face. This leaves only your mouth exposed for easy breathing. A thoughtful design that ensures maximum warmth, making it ideal for extreme cold-weather adventures.

Summary

The Stone Glacier Chilkoot 0° sleeping bag is an excellent choice for backcountry hunters and cold-weather campers who prioritize warmth, comfort, and packability. While the single-height option could hold some back, the bag’s overall performance and spacious interior make it a strong contender in its category. Whether you’re chasing elk in the Rockies or exploring canyonlands, the Chilkoot is built to keep you comfortable and focused on the adventure ahead.

At $650, the Chilkoot 0° isn’t cheap, but it’s a solid investment for those who venture deep into harsh conditions. Its durability, warmth-to-weight ratio, and thoughtful design help justify the price. For most people, the MSRP may be shocking for “just a sleeping bag”, but the Chilkoot is a premium ultralight option that will not only enable you to survive frigid nights out in the wild but do so in comfort. 

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