Free Shipping on Orders $89+ With Code: SHIP89. See Details.
$94.95 Save 36% Compare at $149.99
We apologize for the inconvenience! This product is currently sold out!
This feature is only available for colors and sizes not currently in-stock


About ALPS Mountaineering Ascent 3900 Backpack - Internal Frame

Closeouts. Climb to new heights with the spacious and convenient ALPS Mountaineering Ascent 3900 backpack. Side zips provide quick access to the main compartment, and the padded, adjustable shoulder harness helps you haul large loads comfortably.


Specs about ALPS Mountaineering Ascent 3900 Backpack - Internal Frame

  • Pack material: Ripstop nylon
  • Frame type: Internal
  • Frame material: High-density polyethylene (HDPE)
  • Hydration compatible: Yes
  • Pack loading: Top
  • Ice tool/trekking pole loops: Yes
  • Recommended use: Backpacking Multiday
  • Dimensions: 27x13x9"
  • Volume liters: 64L
  • Weight: 4 lb.
  • Fits torsos: 16 - 22"
  • Made in China
  • Visit our Backpack Guide


Do you own this product? Write a review and help others with their buying decisions!

4.181818 5 Overall Rating: 4.2 Based on 11 reviews

Most Helpful 5-Star Review

Reviewed by Black Diamond from Alabama on Thursday, April 18, 2013
Great pack. Holds every bit of 64L. Perfect size for a weekend trip.
Your search for "" returned reviews for ALPS-Mountaineering-Ascent-3900-Backpack-Internal-Frame Remove reviews search
  • Verified Buyer Reviewed by Kyle Wassell from California on Wednesday, May 21, 2014
    I have not taken this on a backpacking trip yet but as I have loaded down with weight (30-35 lbs) and hiked around it has done well. The straps are solid; the zippers could be a little stronger but have not given away yet; and for my frame (6'4'') it fits like a glove when the should straps are moved up to the highest position. The only gripe I really have is the lack of straps on the outside for tightening down the bag - instead it uses a bungy-like cord that is woven throughout the bag. But this also leaves no real place to put a sleeping pad if the bag is full.

    I am impressed and ready to take it out in the backcountry for a real test!

  • Verified Buyer Reviewed by ispinrifles from West Columbia, South Carolina on Wednesday, May 14, 2014
    The pack is very comfortable, to me. It has a lot of room to pack many things. I like the fact it has a slot to put a water bladder. That easy I don't have to carry and extra camel back. The straps are well padded making it feel as if nothing is there.
  • Reviewed by Brock from Illinois on Monday, May 5, 2014
    Got this for the bid idea that I want to backpack now. The price is right and the quality seems solid. As usual I relentlessly research before I purchase. I was going back and forth between this and REI Mars which is a little bigger, but the price point on this is hard to pass up, and ALPS has a lifetime warranty and seems like a solid company.
    This thing holds everything I need however I wished it had more external pockets and tie down points. It does have the 2 black pockets made out of a sort of spandex, it will fit quite a bit including 1 liter water bottle in each size, almost seemed too tight but it did stretch and did NOT rip. It has one handy pocket on the waist belt you can keep keys, lip balm, small sunscreen container. Also there are a top and bottom lid pocket, I just wished there were a few external pockets to keep things a little more organized.
    I strapped the sleeping pad to the bottom loops but tends to flop around a bit, but this is probably due to my lack of experience backpacking or loading backpacks.
    It is comfortable enough, It weighed in at about 35 lbs. for a night or two packed in.
    The rain fly is very convenient and seems to work very well. As mentioned by an earlier review the external center pocket is very tight and you can only fit in some very light gear, map, socks maybe but not very much.
    I wish there were at least one more set of strap tie downs to lash a small camp chair or bed roll a little higher, but not a huge deal, I can make it work.
    I think this pack is good, but you do sacrifice a few small features for the price, but I am glad I saved $75 (half the price of REI bag) to get this one, no regrets, and I would recommend, mentioning the small shortcomings. I would give it 4.5 stars if possible.
  • Reviewed by MouseRat from Florida-Georgia on Tuesday, March 4, 2014
    This is my first pack so I can't speak to its specs compared to another but it definitely held up well on my first weekend trip. Lots of room in the main pocket, even got to try out the rain fly which worked like a dream! My biggest complaint is the outside pocket which zips down the middle, which isn't really useful as a pocket because it took all my strength to zip it even when the pack wasn't completely full, by the third time I had to access the pocket the zipper actually broke, which was very disappointing as this happened on my first trip. Outside of that though it was great
  • Reviewed by Katie from Washington on Tuesday, February 11, 2014
    I'm a 5'4", and thought this pack would work for me because of the adjustable harness. However, the frame is curved such that when it is fitted to my torso size, the frame extends high enough above my shoulders that it pokes me in the back of the head. If not for that, I totally would have gone for this pack. Lots of pockets, materials seem good, built in rain-fly, awesome price. The shoulder straps look like they might be a little flimsy, but as I ended up returning it I shall never know.

Question & Answer

Questions about this product? Get answers from community and staff experts.

  • “Is the floating lid removable? If so, do you know what the length of the pack is without the lid?”
    Asked by roomani from oklahoma on 5/16/2014 4:40:43 PM
    • It is removable with Velcro on the front. The length is approximately 27.5 inches
      Answered on 5/19/2014 5:57:15 PM by Brock from Northern Illinois
  • “Could you tell me where the hydration port/pocket is on this pack? ”
    Asked by CA hiker from California on 9/7/2013 2:45:33 PM
    • The sleeve is inside next to the frame near the top of the pack. The ports is on the right hand and left hand sides of the pack above the shoulder straps.
      Answered on 9/10/2013 3:08:41 PM by Jack from Sierra Trading Post
  • “Does the top of the pack (brain) detach/convert into a fanny pack?”
    Asked by Charles Forbin from Colorado Springs on 6/18/2013 7:06:09 PM
    • This pack does not have this feature.
      Answered on 6/25/2013 10:35:09 AM by Jack from Sierra Trading Post.
  • “Is this pack adjustable on the frame for torso length or just by tightening the load lifters? It says it fits a wide range, but how does it adjust that range?”
    Asked by Will from North Carlolina on 5/28/2013 5:30:47 PM
    • The shoulder harness assembly attaches to different points on the frame to adjust the torso length.
      Answered on 5/30/2013 10:27:00 AM by Jack from Sierra Trading Post
  • “Does this pack have a convenient place to mount a sleeping pad? I don't see an obvious exterior mount which is what I'm used to.”
    Asked by Mike of the Mountains from NH on 4/9/2013 2:43:17 PM
    • The only place I see that it would be possible is attaching the bag to the loops at the bottom of the pack.
      Answered on 4/12/2013 12:10:42 PM by Jack from Sierra Trading Post

About ALPS Mountaineering

When Dennis Brune founded ALPS Mountaineering in rural Missouri, he had a singular goal: create the best outdoor gear at the most affordable prices possible. As a truly homegrown company, this brand listens to customer feedback and updates products accordingly. From Alps Mountaineering tents built to withstand alpine winds to Alps Mountaineering sleeping pads designed to help you get a restful night’s sleep, products from this company have been tested and approved in some of the most demanding conditions on earth. Whether you’re setting up Alps Mountaineering chairs around the campfire or packing for your next adventure in an Alps Mountaineering backpack, you can feel confident that you’ve chosen an American brand with integrity and an eye for innovation.