• Black Diamond - Cirque 45L Backpack - Black
    Black Diamond - Cirque 45L Backpack - Ultra Blue
    Black Diamond - Cirque 45L Backpack - 3/4 Front
  • Black Diamond - Cirque 45L Backpack - Black
  • Black Diamond - Cirque 45L Backpack - Ultra Blue
  • Black Diamond - Cirque 45L Backpack - 3/4 Front
Black Diamond - Cirque 45L BackpackView Larger Image

Black Diamond Cirque 45L Backpack


Item #BLD00L4


Tech Specs

45L (2746cu in)
active, form-fitting
Shoulder Straps:
Waist Belt:
1 avalanche gear, 2 PickPockets, 1 waist belt
Gear Loops:
Ski Carry:
yes, diagonal and A-frame
Helmet Carry:
yes, stowable
Ice Axe Carry:
Claimed Weight:
2lb 5oz
Recommended Use:
ski mountaineering, backcountry touring
Manufacturer Warranty:
1 year

Light on weight, heavy on capacity.

Despite being one of Black Diamond's lightest, the Cirque 45 Backpack boasts plenty of space for day-long backcountry tours and ski mountaineering missions. Designed for minimalists and ski mountaineers, the Cirque features only the basics but still retains a full-featured design. It carries skis diagonally or at an A-frame, as well as your helmet, avalanche safety gear, ice axes, and even a climbing rope.

Although streamlined for minimalists, the Cirque still sports innovative technology that doesn't add a whole lot of weight to your kit. The SwingArm shoulder straps and stretch waist belt provide active suspension and a streamlined fit. The Cirque is compatible with Black Diamond's AvaLung and SilNylon lid pocket for added safety and capacity when traveling in avalanche terrain.

  • Black Diamond's ultralight backcountry pack for ski mountaineering
  • Large capacity for gear-intensive descents
  • SwingArm shoulder straps and stretchy waist belt move with you
  • Integrated avalanche gear compartment for probe and shovel
  • Tuck-away diagonal and A-frame ski carry straps
  • Stowable helmet flap secures brain bucket
  • Ice axe PickPockets with tuck-away rope strap
  • Reviews
  • Q & A

I Couldn't Be More Stoked

  • Familiarity: I've put it through the wringer

I bought this primarily as a ski touring/mountaineering pack that could also work for UL fastpacking and a crag bag. After about 7-8 months of use as my only pack, I can confidently say it works great for all the above. I love the helmet carry for skiing/climbing, and the options for ski/axe/pole/rope carry are great. The size is nearly perfect, and very adjustable so if you are on a short day tour it can compress down to about 25l. The side pocket is nice for water bottle and puffy access, but I wish the zipper was longer.

I  Couldn't Be More Stoked

Versatile bag!

  • Familiarity: I've used it several times

All in all I am very impressed with this bag! It's lightweight, durable and comfortable all at the same time. I've used this bag now for some ski touring here in the Wasatch mountains and it's been a dream. I've also used it for some day hikes in the desert and I find it to be exactly what I need and nothing more. I plan on using it for climbing and some overnight hiking trips once the weather warms up. The only fault I really see with the bag is that the "Avalanche" pocket doesn't seem to have the most intuitive design, the slots that they have there are not especially useful for a probe or a shovel. It seems like that could have been designed a little more thoughtfully to hold your rescue equipment.


  • Familiarity: I've used it once or twice and have initial impressions

Bought this for ski touring and it's a very light pack. The sunglass pocket on the hip strap is pretty convenient. Although, I it's tough to also fit a hardcase for glasses inside of it. The side zip access pocket is a bit small, but better than only relying on top access. There aren't a lot of small pockets for organization, but there are enough.

Finally a great ski pack

  • Familiarity: I've used it several times

why do I love this bag? well its extremely lightweight, but still has plenty of well thought out pockets and straps to store your gear. Loops for ice axes, separated avy gear pouch, side access to the main compartment. I've been very impressed with this pack and highly recommend it to friends!


  • Familiarity: I've used it several times

This backpack is perfect for backpacking, and backcountry touring since it is extremely lightweight and can fit all of your essential gear!

Black Diamond

Men's / Unisex
 SMLS / MM / L

15.5 - 18.5in

(40 - 47cm)

17.5 - 20.5in

(45 - 52cm)

19.5 - 23.5in

(50 - 57cm)

16 - 19in

(41 - 48cm)

18.5 - 21.5in

(47 - 55cm)


27 - 32in

(69 - 81cm)

29 - 34in

(73 - 86cm)

34 - 39in

(86 - 99cm)

26 - 40in

(66 - 102cm)

28 - 45in

(71 - 114cm)


15.5 - 18.5in

(40 - 47cm)

17.5 - 20.5in

(45 - 52cm)


27 - 29in

(69 - 74cm)

29 - 31in

(74 - 79cm)

How to Measure:
From the base of the neck to the narrowest part of the waist.
Around the narrowest part of the waist.