Alps Mountaineering Caldera 90 L Backpack


Boasting dual aluminum frame stays and a massive 5,500-cu.-in. capacity, Alps Mountaineering’s Caldera 90 Pack lets you explore long trails. Padding on the shoulder straps extends all the way to the back to cushion your load over the long haul.


1 in stock


Lycra®-spandex-covered suspension straps keep you feeling balanced over difficult trails, while an internal horizontal divider makes it simple to organize your load for balance and convenience. Top-load design has a drawcord closure and an extendable top lid. Large zipper provides simple access to the main compartment from the front. Top pocket converts to a fanny pack for exploring once you’ve reached camp. Lower compartment is easily accessible through a No. 10 zipper. Lashing points and multiple compression straps let you strap items to the exterior. Hydration-reservoir compatible with water ports on both sides so you can sip water from either side. Stretch pockets on the side securely hold water bottles. Comes with both a small and XL removable padded waistbelt with pockets. Rain cover keeps your camp gear dry when hiking through surprise storms. Bungee attachment for trekking poles along with trekking-pole loops and tip-keeper rings. Convenient safety whistle built into the sternum-strap buckle.



Alps Mountaineering

Our providers of camp furniture, sleeping bags, backpacks, and our extremely popular Readylite Cots.



  • Lightweight polyester
  • Lycra® covered adjustable suspension components
  • Shoulder strap padding wraps to back for maximum comfort
  • Dual aluminum frame stays
  • Internal horizontal divider
  • Generous front access to main compartment
  • Full-access lower compartment – #10 zipper
  • Top pocket converts to a fanny pack
  • Top loading – extendable top lid
  • Spindrift collar with draw cord
  • Front stretch pocket
  • Front wing lashing system
  • Trekking pole loops with tip keeper rings
  • Trekking pole bungee attachment
  • “Over the top” compression and multiple side compression straps
  • Stretch side bottle pockets
  • Rescue whistle buckle on sternum strap
  • Hydration pocket and ports
  • H2O outlets on both sides of pack
  • Removable padded waist belt with pockets
  • Small harness option available
  • Small and XL waistbelt options available
  • Rain cover included


Weight: 5 lbs. 15 oz.
Capacity: 5500 in³ / 90L
Torso Range: 16″–22″


Rental – $12 /day

Purchase New – $190

At Explore Rentals we are primarily in the rental business. Occasionally, we sell new and used items. If the item is marked “sale” it is being sold used. If you are interested in purchasing an item, please call the office 406-922-0179. All of our rentals, and sales, begin and end at our location in Bozeman, MT.