Review: Hyperlite Mountain Gear Square Flat Tarp

Over the past year I have used the Hyperlite Mountain Gear Square Flat Tarp in a wide range of environments. Testing grounds have included regular excursions into Mexico’s Sierra Madre, the traverse of Badlands National Park, and above treeline routes in the Beartooth and Sangre de Cristo Ranges. Here are my impressions of the shelter:

Specs & Features (as per HMG Website)

Price:  $355

Weight:  9.8 oz with guylines (Note: I swapped out the HMG guylines for Kelty TripTease Lightline)

Size: 8’6″ x 8’6″


  • DCF8 Dyneema® Composite Fabrics (formerly Cuben Fiber)


  • Constructed with DCF8 Dyneema® Composite Fabrics (formerly Cuben Fiber)
  • Fully bonded radial double reinforced tie-outs with line locks
  • Fully bonded, “stitchless” ridgeline seam
  • 16 Perimeter tie-outs
  • 4 tie-outs placed in the center, one-third, and two-thirds of the interior body
  • Comes with a Medium DCF8 Stuff Sack for storage
  • Includes 10 ultralight 2.8mm UHMWPE Core Guy Lines


Double Thumbs up. In the last 12 months I have regularly taken this tarp into extreme above treeline environments – high winds, rain, sleet and snow – and it has never been anything other than rock solid. The combination of high end materials, simple design, a multitude of well-placed guyout points (both on the perimeter as well as mid-panel/s), sturdy tent pegs (I use a combo of different sized MSR Groundhogs) and low/taut pitches has seen me ride out multiple storms above 10,000 ft. That being said, when the rain is coming in at a 45° angle at those elevations, an “umbrella door block” can be worth its weight in precipitation deterrent gold (see photo below)!

(Note: Unless you have a good deal of experience with tarps and severe weather, I wouldn’t recommend using this shelter above treeline).

Hunkered down at 12,000 ft during a wild storm in the Sangre de Cristo mountains | CO.


If you’re around 6’1″ (186 cm) or less the square flat tarp is a great option. If you’re much taller than that, I would suggest going with a longer/larger tarp; for solo hikers either a 9′ x 7′ rectangle or a 9′ x 9′ Square, depending on your preference . I am 6’1″ on the button, and the tarp was just big enough to suit my purposes in severe weather (Note: In regards to size recommendations for two people, I would suggest an 8′ X 10′ model).

In other online reviews of the Square Flat Tarp, I’ve seen it mentioned that the shelter is large enough for two hikers. I would disagree with this assessment, with the following caveat. If you do all of your backpacking in either mild conditions and/or sheltered environments, then yes, the Square Flat Tarp is big enough for two people when pitched in A-Frame mode. However, if you occasionally like to venture out into more exposed environments where inclement weather is common, then in my opinion this is not a two person shelter when pitched low in storm mode (i.e. When one end is staked to the ground, it is simply too short).

Sheltered site in the Beartooth Mountains, MT.


One of the biggest pluses of a flat tarp is the ability to pitch it in a multitude of configurations. However, with the exception of the occasional emergency pitch, I generally just use two variations; “storm mode” (as seen in most of the photos) and A-Frame. The latter was my go-to pitch on the recent trip to the States, due to the often-extreme conditions in which I was hiking. When I’m overnighting in the more mellow, sheltered forests of Mexico’s Sierra Madre, I invariably use an A-Frame pitch (except during the June to October rainy season).

Jerry-rigged on a scree slope at 11,000 ft, during an afternoon electrical storm | Sangre de Cristo Traverse, CO.


In three decades of tarping, I’m not sure I have used a more solidly built model than the HMG Square Flat Tarp. From the fully bonded reinforced tieouts to the heavy duty Dyneema Composite Fabric, this tarp was built to handle inclement weather. Nonetheless, you definitely don’t want to skimp on either guyline or tent pegs; one of the more common mistakes made by ultralight hikers. With the sheer number of tieout points available, there is little excuse for not being able to achieve an even distribution of tension (i.e. the key to a taut pitch) when using the Square Flat Tarp.

Great Sand Dunes National Park | CO.

Value for Money

Hyperlite Mountain Gear products aren’t cheap. However, as with the HMG 2400 Southwest Backpack I reviewed last year, the Square Tarp is well constructed, sports high end materials, is made in the US, and most importantly, does what it is supposed to out in the field. I would say it represents fair value for money.


The HMG Square Flat tarp is an excellent option for minimalist hikers that enjoy venturing into challenging environments. The design and workmanship are top notch, and it holds up like a champ when the elements are raging. I give it 8.5 out of 10; which seems appropriate considering its dimensions. 😉

Badlands Traverse, South Dakota.

Disclosure: The Hiking Life was given the HMG Square Flat Tarp free of charge in exchange for feedback from the field. This post contains affiliate links, which means The Hiking Life receives a small commission if you purchase an item after clicking on one of the links. This comes at no additional cost to the reader, and helps to support the website in its continuing goal to create quality content for backpackers and hikers. 


Review: Hyperlite Mountain Gear Square Flat Tarp — 15 Comments

  1. Great review and most helpful however how is this with condensation? My sil-nylon tarp in storm mode is incredibly bad at temperatures below 15 deg C in moist or misty conditions.

    • Hey Tony,

      In the conditions you describe, you may be better off pitching it in A-Frame mode to allow for more ventilation. Alternatively, instead of pegging the back corners directly to the ground, consider using a couple of very short guy lines to allow for a bit more air flow.

      To be honest, there are times when some condensation is unavoidable, irrespective of the material or shelter design. A bandana can come in handy!



      • Thanks Cam, The last occasion this became a serious problem was just below a summit with minimal shelter from a stiff easterly wind demanding a low secure pitch. At about 4.30 am the wind dropped and the cloud descended but only for about 1/2 an hour; that was enough to saturate the tarp, sleeping bag and me. It was an early start that day but a long lunchtime allowed an “A” frame pitch to dry the tarp and sleeping bag in hot sun and a gentle breeze. Such is life in the hills Eh! Go Well, Tony

  2. Thanks for the review Cam, I have one of these tarps myself and really like it. Do you have any particular length of guylines that you use? I am still working through the most efficient way to arrange it for putting it up and taking it down.


    • Hey Russ,

      Generally speaking I’ll take 2 to 3 footers for the sides (4 to 6), 8 to 9 footers for the ridge line (2) and 5 to 6 footers for the corners (4). I’ll also normally pack an extra couple of 8 to 9 footers just in case I want to guyout the mid-panels. As I mention in the article, guyline and tent stakes is something I never skimp on; particularly when hiking in areas prone to dodgy weather.

      Hope that helps. The only other thing I’d say is to try to keep things as simple as possible. Sometimes folks complicate tarp camping more than is necessary.

      Best of luck!



  3. Hey, Cam,

    I agree with the endorsement of a good flat tarp; I’ve been camping in a large silnylon one (originally designed for hammock camping and plenty adequate for two plus dogs); and more recently, when solo, a cuben of size mentioned here (by Zpacks).

    Bit of a learning curve and cold fingers struggle with tying those guylines out at times, but I love the economy and weight.

    Also, just a more intimate relationship with the surroundings.

    Good on ya’!

    • Hey Potlikker (still chuckling about that name),

      Yep, guylines can sometimes be a bit fidgety when it’s cold, and I couldn’t agree more in regards to the “openness” of tarps.

      Thanks for the comment.



  4. Hey Cam,

    Quick question. I am looking to purchase a tarp. My issue is that I can’t decide on which size to go with. I’m 5’9″, the tarp will be used in all different conditions, I’d like something minimalist but not quite a poncho tarp, and lets just pretend I have the skills needed. Would you suggest a 8.5×8.5 square tarp as the best option? or is something like a 6×9, or 7×9 a better option? Any information you could share is massively appreciated.


    • I’d say either a 8.5 square or a 7×9. If it’s your first tarp, go with the latter. When I’m using a rectangle tarp I generally just pitch it in two ways; either the Half Pyramid (go-to) or A-Frame pitched low with foot end corners staked directly to the ground (inclement conditions).



  5. Cam,

    I’m very close to committing to the 8×10 version of this tarp, but I’m still deciding whether or not to pay the extra money for the spruce version over the white. My main consideration is the possibility of midday rest shade when hiking in hot and exposed environments. Since DCF is semi-transparent, do you think the spruce version would give additional shade over the white?


    • I’m not sure. If i had to guess, I’d say it would provide a little extra shade but not too much. Your best bet would be to drop the folks at HMG a line directly and ask them.



  6. Great review Cam. I do have two questions though. First, is there a particular reason why you went with the 8’6″ square version versus the 8′ by 10′ version. Are there particular advantages to the square vs. the rectangular version?

    Secondly, are you using the linelocs that come attached to the tarp? Or do you remove them and just utilize knots (like a boline)? Or some combo. I know Skurka tends to lean towards knots vs the hardware.

    Just curious. I’m pretty sold on this piece of kit. Maybe paired with a Borah bivy.

    Thanks for any info!

    • Hey Jeramie,

      Thanks for the kind words. I went with the 8’6″ square model mostly because of the smaller size, and the fact that I invariably carry a bivy when I’m tarping. Additionally, I’m a side sleeper who tends to curl up in the fetal position, so the length wasn’t much of an issue. If you are over 6′ and like to stretch out when you sleep, I’d recommend going with the 8×10; or even a 9×7 model with another manufacturer, if you decide to combine it with a bivy.

      As for the line locs Vs knots question, I’ve done both and don’t really have a preference. The former can be easier in cold and wet weather, as it saves fidgeting around when your fingers may have lost some dexterity. The weight difference is negligible (maybe an ounce?) and it’s rare that the locs will fail in anything except extreme conditions. Go with whichever option you feel more comfortable with.



  7. Do you find there to be a difference in versatility between the 8’6″ square and the 8’x10″ tarp? I would think the larger one would have more options. Plus, the larger size would provide more room and coverage during a storm. But at the cost of weight and bulk.

    Also, what guy line lengths do you use?

    Any info would help!


    • Hey Jeramie,

      Sorry about the delayed reply.

      In regards to versatility, the 8’6″ square flat tarp won’t be as effective in A-Frame configuration, due to the fact that it’s quite a bit shorter in length. That said, I’ve ridden out some very heavy weather when I’ve had the square tarp pitched low in “storm mode.” If you go with the 8’x10″ model you can get by without a bivy, if you choose the square model you should probably take one if inclement weather is on the cards. Whichever way you go, the construction of the HMG tarps is bomber.

      As for guylines, if I’m using the square flat tarp I’ll take the following: 2 x 9′, 4 x 6′, 6 x 3′.



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