The king of bivy hunting backpacks.

The MYSTERY RANCH METCALF is an all-around workhorse with enough volume for more than a weeklong backcountry hunt while remaining compressible enough for a stealthy afternoon stalk. Built into our Guide Light Frame™, which provides a load-bearing solution by becoming stiffer and more stabilized as you add weight to it, the METCALF has ample capacity to carry a heavy load. Its primary feature, the Overload™, keeps bag contents clean when packing out a carcass. With a detachable lid, side detail pocket, and a full-length side zip access, this pack is a favorite among hunters looking for versatility and all-around utility. The MYSTERY RANCH METCALF in Subalpine is your answer to multi-day quests into the wild.

  • 610 HP CORDURA® and YKK® Zippers
  • Guide Light Frame™
  • Overload™ feature
  • Top-loading shroud
  • Side zip access to main compartment
  • Detachable lid
  • Carbon fiber stays
  • Auto-lock buckles
  • Redirect waist belt
  • Bow and rifle carry
  • Hydration reservoir compatible
  • Side zip pocket
  • Side stretch pocket
  • Telescoping yoke for custom fit torso length

Overload™ Feature

Functional expandability – via the Overload™ feature – is designed into the METCALF and other MYSTERY RANCH hunting packs. The Overload is a shelf situated between the frame and the pack that can be used when extra capacity is necessary. With added length to the compression straps and auto-locking buckles to prevent slippage, the Overload allows you to put the bulk of the weight closest to your back and the load to be secured and stabilized for optimal pack-out comfort. Whether big game hunting or just needing the option of extra capacity, the Overload feature meets the demands from our hardest-core users.

a / Unbuckle top, side, and bottom compression straps on each side of the bag (8 total).

b / Unthread loadlifter straps from the top of the frame and lower slant cut web on each side (8 total).

a / Pull bag upwards off the frame.

b / Loosen adjuster buckles in middle of frame to the desired shelf length based on the size of the load.

c / Situate load evenly on the frame and reconnect all compression and loadlifter straps.

a / Always place the heaviest items in the center of the frame to maximize carrying comfort.

b / Compress evenly, securing the load and adjust the load lifters to suitable carrying comfort.


The only digital concealment pattern based on animal vision and engineered to optically fade you into your surroundings

GORE™ OPTIFADE™ breaks the mold by using a digitally rendered blend of micro and macro patterns to fool animal vision. Created by a renowned team of camouflage and animal vision experts, GORE OPTIFADE Concealment takes into account how elk and mule deer see when looking through vegetated terrain. The end result: a pattern that features optimized contrast through detailed shading and colorization. Simply put, a new camouflage that allows you to effortlessly blend into your surroundings.

GORE OPTIFADE Subalpine is designed specifically for stalking and ambushing ungulates from ground level in tree-covered and vegetated terrain and is optimized for engagement ranges of 50 yards and less.

Deeper Into Understanding Ungulates

Understanding that animals view the world differently than humans, the team of experts developed GORE™ OPTIFADE™ Concealment around the optical aspects of animal vision and not human eyesight.

We know that elk and other ungulate eye placement is designed for an extremely wide field of view—nearly 280˚—in order to quickly scan the horizon for potential threats. The trade-off for such a wide view of the world is diminished visual acuity. Using our standard of measurement, where we see 20/20, an ungulate sees around 20/40. Additionally, while humans have trichromatic vision—receptors providing us our full range of color vision—ungulates are dichromats. Lacking the receptors for tones in the red spectrum, they view the world in shades of yellow, blue, and gray.

MYSTERY RANCH METCALF Available with Women’s Specific Harnessing

The MYSTERY RANCH women’s specific harnessing provides custom design featuring narrower and ergonomically shaped shoulder straps that contour around the women’s breasts as well as feature an adjustable chest strap allowing the user to place it in the most comfortable area across the chest.