Built Worldwide

A backpack for all your transcendent, mountain adventures.

The Sphinx features a long, center-front zipper, allowing you to see and access all your gear. With our sturdy, lightweight Adventure Frame, it provides a supportive, stable, comfortable carry. Designed with two vertical “torpedo” pockets and a removable lid, this pack has all the features necessary for your next backcountry mission.

  • Adventure Frame with adjustable yoke
  • Durable 210 Robic fabric
  • Top-loading design for easy/secure packing
  • Two vertical “torpedo” pockets for external access
  • Water bottle pockets keep hydration handy
  • Hydration reservoir compatible
  • Removable, double-wrap, re-direct waist belt
  • Adjustable ice axe loops for trekking poles or ice tools
  • Volume: 3960 cu-in (65 L)
  • Weight: 5.31 lb (2.4 kg)
  • Frame System: Adventure Frame
  • Country Of Manufacture: Imported
  • Intended Use: Backpacking, Lightweight Backpacking, Weekend Backpacking

Frequenty Asked Questions

We're moving to a kitted system so that we can design and build packs and frames that are optimized for integration based on the function of the product. There are some cool new things in the works. In the meantime, we may be able to accommodate pack only orders based on available inventory - contact MR Customer Service or call 406-585-1428

As much as we would like to be able to offer our military/LE/ firefighter customers a discount on our packs, we have government contracts in these markets that prevent us from doing so.

The only repair that we can offer on Dana Design products is a replacement back foam pad on packs with the ArcFlex body panel design. We can ship the foam to you and you can easily install it yourself without having to send the pack in to be repaired. Replacement back foam pads are $15.00 plus shipping. For any other Dana Design pack repairs, please contact Marmot or try the following reputable gear repair companies:

Marmot Warranty:

(888) 311-2900

Mon - Fri : 7:30am - 5pm (PST)


Boulder Mountain Repair:

2200 Central Ave. Suite F

Boulder, CO80301

(303) 499-3634


Rainy Pass Repair:

4415 Stone Way N.

Seattle, WA98103

(206) 523-8135


We are not set up to perform custom work on individual orders and no, we cannot build a pack for you in a custom color. If your concern is in regards to sizing please give us a call at 406-585-1428.

Also, please know that modifying your Mystery Ranch pack may void the lifetime warranty, so please think first before you start ripping straps off and cutting holes in your pack to make it more aerodynamic for winged flight.

First, start by washing your pack with hot water in the shower. Use a mild detergent like Dawn to get minor dirt and grime out of your pack. Dry the pack out of direct sunlight. DO NOT USE HARSH CHEMICALS TO CLEAN YOUR PACK. If you need to get odors/blood out of your hunting pack, please use Atsko Sport-Wash Laundry Detergent

We always recommend that you size down for the waist belt. If you fall in-between sizes on the yoke, we recommend that you size up.

Mystery Ranch accepts returns for a refund within 60 days of the original purchase date. Items must be returned in brand new, unused condition, and shipping charges are non-refundable. Please give us a call at 406-585-1428, and we can get you set up with a Return Authorization (RA#).

If you are in need of a different size yoke or waist belt, please give us a call at 406-585-1428.

Why did you add a production facility in the Philippines?

MYSTERY RANCH added these facilities because of the increased demand for our product. We needed the additional facilities to build for customers who don't require (Berry Compliant) US production and / or don't want to pay a premium price for products built in the U.S.A. With these additional offshore facilities, we are able to focus our domestic facilities on the Berry Compliant orders.

How do I know if the pack I want is made in the US, PH, or VN?

It will be noted on the product page on our website and you are always welcome to call us and ask if you don't see the "US" or "world" icons that denote production location.

Is the quality of the packs the same?

Yes, absolutely! We carefully select the highest quality materials and ensure that all production facilities adopt our quality standards and techniques to deliver products consistent with the MYSTERY RANCH legacy. Our distributors who have received product from the US, PH, or VN are unable to tell the difference without looking at the label.

How do you ensure consistent quality?

Our factory resources use the protocol defined by our team in our production packages in order to deliver consistent quality gear. Upon introduction of new products, our product engineers visit our factory resources to work with them to develop new styles. As the product goes to production, our QA and QC teams will then visit our US, PH, and VN factories to ensure the finished goods meet our MYSTERY RANCH standards.

For more information please contact MR Customer Service or call 406-585-1428

I have had my Sphinx for approximately 5 months now and I am very satisfied. I am an outdoor educator for the BSA and guide young men and women on 100 mile treks through the wonderful cascades. Because of this I have strenuous requirements for my gear; my gear and systems must be as down right reliable and efficient as possible so that while I'm out on trail I'm more focused on what I'm doing to teach then I am worrying about gear. The Sphinx is just that. This pack is reliable, has excellent accessibility and is very adjustable to the user. If you have done any research on Mystery Ranch you know they specialize in load carriage. While using this pack I had the great challenge of caring 60 pounds of gear and my back shoulders and hips were as comfortable as can be (my legs were a different story). There are few things this pack is missing and some of them are surprising; such as a rain cover, Velcro hydration loop organizers, and possibly some other small things. One thing I would like to see as an improvement would be a "conversion kit" if you will to give it the "summit bag" capabilities that the Stein 62 has. Again I LOVE my sphinx to death and highly recommend it. Kind regards, Jared.