If you were to set up any of the new mtnGLO tents from Big Agnes, I can almost guarantee that you wouldn’t notice any difference between it and any comparable tent from a major brand. The same light fabrics, the same techy DAC poles and thoughtful design that we expect to see from quality backpacking tents is here, and in many ways these are still the most important parts of a tent. But, if you were to look up at the ceiling of the Rattlesnake SL2, you’d notice a tiny black box – and that’s where it all starts.

Big Agnes Rattlesnake SL2 mtnGLO Features:

  • Features two doors and two vestibules
  • Quick Stash on tent body door makes stowing unzipped door simple and easy
  • Steep wall construction and cross over pole improve tent interior’s living space
  • Media pockets located above sleeping area enable clean ear bud cord routing from phones or other devices
  • Storm flaps on vestibule zippers
  • Reflective guylines and webbing on tent corners
  • Fly and floor are silicone treated nylon rip-stop with 1200mm waterproof polyurethane coating
  • Tent body is breathable nylon and polyester mesh
  • All seams taped with waterproof, solvent-free polyurethane tape (No PVC or VOC’s)
  • DAC pole system with press fit connectors and lightweight hubs
  • Plastic clips attach tent body to pole frame
  • Hub pole design
  • 8 aluminum hook stakes
  • Two interior mesh pockets
  • Two internal media pockets
  • Light strand can also be powered by any USB source
  • MSRP: $349.95

Big Agnes Rattlesnake SL2 mtnGLO


Has Big Agnes seen the light?

I realize that I am in great danger of participating in the huge array of puns that have been directed towards the new mtnGLO tents since they were unveiled. I’ll do my best throughout this review, but one or two may slip through. In any case, what we’re really here to talk about is a stellar backpacking tent that just happens to have a string of LED lights running along part of its stitching. I’ll go through the tent like I would any other tent, and then treat the mtnGLO technology at the end.

The Rattlesnake SL2 builds off of a trusted design platform that Big Agnes has successfully used numerous times in the past. A DAC center pole stretches along the tent, before branching into Y’s at each end via plastic hubs. That long center pole is reinforced by a crosspole that pulls the walls especially taught. You’ll be relying on the inherent strength of that design entirely, too, since Big Agnes didn’t include any structural guy-out points from the fly. Unfortunately I wasn’t able to test this tent in any really significant wind, but based off of my experience with other tents of similar design I would be cautious putting this one up against gusts beyond the high 30’s or so. Why? Well, a lot of the features that make this a great tent to live in also make it a target for wind.

Big Agnes Rattlesnake SL1 mtnGLO Tent Review

The rain fly is easily-attached and tightened as necessary.

And what, you ask, are some of those great features? The most noticeable one is fact that the tent has steeply sloping walls. They’re almost vertical, which is a very desirable trait. It maximizes actual interior space, so what you’re getting from square footage translates into more actual living space. That’s great in almost all circumstances, but take note that it means you’ll be getting broadsided if there’s any appreciable wind.

That aside, let’s look at a few specs. The tent boasts 27 square feet of interior space and a peak height of 40″. Both of these are respectable measurements for the class, and they’re nicely accented by those vertical walls that I mentioned. What’s the practical upshot of these traits? Well, I tossed around the term ‘livable’ quite a bit – what makes a tent livable? It’s things like this: good interior space, a high ceiling, pleasant coloring, etc. The coloring on the tent is a nice balance between earth tone and neutral – a mostly grey fly and dark brown vestibules makes for a pleasant change from the eccentric colors of many modern tents. It results in nice morning light filtering through the tent, which is a major plus when you’re waking up in it day after day.

Big Agnes Rattlesnake SL2 mtnGLO Tent Review

Pop-out ventilation with lights inside.

As a matter of fact, those two particular stats (the peak height and the interior space) aren’t actually that impressive within such a competitive class. However, in some some ways the Rattlesnake doesn’t need to have, say, such a high peak height (other tents can be four inches taller) because its walls are so near to vertical. Similarly, 27 square feet interior space is fine, but the Rattlesnake also boasts 9 square feet of gear storage in the vestibule. So, all in the all the Rattlesnake isn’t breaking any records here, but it’s a very pleasantly livable tent.

The tent’s other features are carefully selected for backpackers. There are two largish D doors that each open and close via a fairly delicate gauge zipper – be careful to keep it clean – and allow for quick pee exits in the night without disturbing your partner. The zipper pulls (and accents on the fly) are reflective, so you’ll be able to see the tent at night of mtnGLO isn’t lighting your way home. Meanwhile, the height of the mesh paneling decreases as you travel towards the foot of the tent, providing a good mix between privacy and visibility. The actual foot of the tent is taken up by a full mesh window, which is pleasant. And, of course, there’s a full bathtub floor and all of the relevant seams are taped and sealed.

Big Agnes Rattlesnake SL2 mtnGLO Tent Review

Let the light shine!

Although talking about the tent’s normal features is certainly illuminating, I know why you’re all really here – mtnGLO. Yes, it was big news and I’ve been drooling over the press material that’s been coming my way ever since it was first released. The Rattlesnake is the first tent I’ve had the chance to test that integrates the system, and so I had some high expectations. The upshot? mtnGLO is understated. I view this as a good thing, but let me explain. All of the advertisements that I’ve seen of mtnGLO tents features long exposure photography that greatly enhances the brightness of the LED lights. You’d think that you have miniature football stadium lighting in your tent based off of the advertisements alone.

The actual product is more subdued, and correspondingly much more helpful, than that. First, brightness: the system has two intensity settings and they’re both actually quite dim. Youngsters like me can read a book by its light, but not without some serious squinting. Frankly, I’d prefer to read by a headlamp because the system is just too dim.

Big Agnes Rattlesnake SL2 mtnGLO Tent Review

The control unit for the lights uses 3 AAA’s (disco mode not included).

However, mtnGLO proves its worth in other ways. For example, it makes finding gear a breeze. If this were to be integrated into a four season tent, it would be an absolutely killer aid in having fast, streamlined alpine starts. Imagine being able to pop on lights (which would help wake climbers up) and then quickly be able to see all of the gear you need. That would be awesome. Another absolutely brilliant application? Having something like mtnGLO during an extended storm (ie, when you’re huddled up in the tent during the daylight hours) could add immeasurably to morale.

Big Agnes Rattlesnake SL2 mtnGLO Tent Review

It features earbud cord routing from the media pocket.

All things considered, though, this ‘understated’ theme plays itself out in even better ways. Case in point: you can’t even tell that the system is there. The LED lights are so fine that they roll up imperceptibly within the tent, and all that’s left is the (admittedly somewhat clunky) battery box. No, I didn’t especially notice that either as I packed the tent. What I won’t get into too much, though, is weight comparisons: yes, the system adds some weight. You’re taking a penalty to be able to have the convenience of ambient lighting in the tent.

The Good

  • Highly livable tent – especially with twin doors and near-vertical walls
  • Simple, trusted pole design for quick setup
  • Spacious vestibules are a helpful touch
  • Four pockets means no fighting for storage
  • Bathtub floor is deep and all of the seams are factory taped!
  • DAC poles are, as always, silent heroes
  • Color coordinated fly clips are helpful
  • mtnGLO technology is an understated, refined contribution to backcountry life

The Bad

  • Lack of guyout points imperils structural integrity in wind
  • Small gauge zippers need extra care
  • mtnGLO system is not as bright as some users would wish

The Bottom Line: Rattlesnake SL2 mtnGLO

Going into this review, I was wondering if the Big Agnes tents sporting mtnGLO would be substandard tents featuring a dazzling new technology. If the Rattlesnake is representative of the rest of the line, that is patently not the case. The Rattlesnake stacks up well against not only other BA tents, but also offerings from major competitors. So, the mtnGLO technology is not so much a selling point as an appropriate capstone to an otherwise worthy tent. Is it worth the slight but undeniable weight penalty? That’s for you to decide.

Buy Now: Available from Backcountry.com

About Author

Kevin Glover is an outdoorsman living, climbing and biking in Spokane, WA. Originally from the Nevada high desert, he moved to the PNW for its mild winters and allergen-free summers. He has guided throughout the Cascades and Enchantments for Peak 7 Adventures.


  1. Excellent review.

    But you couldn’t pay me to drop the bananas on this tent. I have another Big Agnes SL tent and the 27 sq ft. space in this one would be a crazy tight fit for two. It’s also over 4 lbs. If I’m carrying a four lb. 2P tent it’s not going to have paper thin floors and get pounded in weather.

    I haven’t used it so my perspective is limited but do we REALLY need lights in tents? Is finding gear that much harder with a headlamp? Is an extra pound a half for a small 2p worth it?

    Again, this review was great but I can’t see this offering as anything more than a gimmick from BA. Maybe it will appeal to the ‘glampers’ out there but I don’t expect this technology will find it’s way throughout the industry.

    • I can see the value of lighting under certain circumstances, but yes it does add weight (as Kevin pointed out). Again, BA has several tent options that don’t have this new lighting system, but there’s certainly a market for it.

  2. Hey TJ,

    Yeah, you make a good point. And, to be truthful, it probably just means that you’re not the sort of outdoorsman that Big Agnes is marketing to. The ultralight crowd would never spring for a tent with lights anyway. In hindsight, one thing that gives me pause is the size/weight ratio of the tent – as you pointed out, it’s ‘crazy tight’ for two, and compared to its relative heftiness that’s not a very flattering thing.

    Anyway, to each his own. mtnGLO definitely has been catching on here in the Spokane scene, and it’s cool to see something new come to the tent market. To each his own, so long as it can sell!

  3. Hey Kevin! Wondering if you’re familiar with Washington’s own MSR, specifically their Hubba Hubba NX and how this stacks up to that.

    I’m 5’11 and split my time between solo camping and with a friend, so the extra space I’m given to believe the Hubba has is appealing. I’ve had the chance to set one of those up and it really is skookum! Currently don’t have access to the rattlesnake, but i did set up the Seedhouse 2p and it was just wayyy too small!

    Mtnglow is sweet and i’m willing to pay the (small) penalty for that luxury. Also the green colour scheme and open air mesh when the fly is off is super appealing for star gazing. But is the hubba just a better general tent?


  4. Hi Blake,

    Thank you for the comment! You know, I’ve tested several MSR tents but I don’t have direct experience with their Hubba Hubba NX. So, I don’t want to comment too directly on a comparison here. You’re right, the MSR has around 2sq feet extra. It is also a tad lighter. Based on the stated pack weight, the MSR is also a tad lighter. The other thing that could be a big advantage to you with the MSR is that it looks like it’s got two vestibules… for rainy PNW nights with a partner, you might like that.

    So, I don’t have a conclusive answer for you. But these are the relevant specs that I think are important. Let me know if I can answer any other questions!


Leave A Reply