Anyone who has spent a stormy winter night huddled in a tent has heard his or her inner voice asking: “is this thing going to hold?” In cold temperatures and inclement weather, we appreciate being dry and cozy, but value most the peace of mind that our gear will hold up. As a winter basecamping tent, The North Face Summit Series Mountain 25 is designed to provide bomber protection in all seasons. We tested it in a variety of situations, and the worse the conditions became, the better the tent performed. With an extremely sturdy pole design that withstands heavy winds and snow, impressive ventilation, and sizeable vestibules that allow for gear storage, the Mountain 25 makes an excellent basecamp or expedition shelter. Below we break down our experiences with the Mountain 25's weather protection, interior space, durability, ventilation, and more. To see how the Mountain 25 stacks up, see our article on the best 4-season tents.
 

Performance

Weather Protection

The term “bomber” has become cliché and overused, but it rightfully applies to the Mountain 25 tent. With a double-wall design, rigid pole structure, and high quality materials, this tent can take on just about anything. We recently spent a restless winter night in the mountains during which we each had a few anxious moments of reminding ourselves that the tent was designed to withstand gale force winds, all the while mentally circulating through our options if our shelter were to be ripped apart. Worst-case scenarios quickly can become reality when the temperature is well below freezing. But despite the howling winds and heavy precipitation, the tent felt sturdy and aerodynamic. When the calmness in the morning allowed for a perimeter check, the tent and our gear inside looked as fresh as it had at setup.
The North Face Mountain 25 (shoveling)

In terms of specs, the 40-denier nylon fly on the Mountain 25 has a 1500-millimeter Polyurethane (“PU”)/silicone coating and fully taped seams. This creates a highly water resistant shelter over the inner tent, which is made up of uncoated 40-denier nylon (70-denier on the floor) and 20-denier mesh. The fly also has 17 Velcro attachments on the underside that connect to the poles of the tent, which stop the fly from flapping during high winds or from settling onto the tent body when weighted down with snow. It also retains the separation between the canopy of the tent and the fly to help keep precipitation from seeping in.

This tent is designed to withstand high winds and heavy pelting snow, and that it does. Four DAC Featherlite NSL poles slip into the sleeves in the tent, and cross over in multiple places forming 7 “X”s, including one on the roof. This construction creates ridiculous stability for the inner tent. The clever guyline system, which we discuss further in the “setup” section below, further contributes to the Mountain 25’s impressive stability in serious storms.
The North Face Mountain 25 (night mountain)

There are two doors, one at either end of the tent, which we personally love for convenience as well as for protection. Depending on the wind direction, the choice of doors allows one to be strategic about entering and exiting while keeping cold air and blustery snow out of the tent. Furthermore, each door opens into a vestibule, allowing even more protection from the elements.
 

Interior Space 

2-person tents rarely feel spacious, particularly with large packs and other gear, but the Mountain 25 is surprisingly roomy (The North Face does make a larger 3-person variant, the VE 25 tent). The 32.25 square feet of floor space is sizeable for a 2-person tent (the typical range is 28 to 35 square feet) and allows for two full-sized sleeping mats with extra space for random gear and clothing. The dome-style roof (peak height of 41 inches) offers generous yet symmetrical headroom—avoiding the one lonely “sweet spot”—so two people easily can sit up while reading maps or playing cards and waiting for a break in the weather. The floor space is rectangular, allowing roommates to sleep facing either direction, depending on which door you choose as your main entrance. We also often opt to sleep opposite each other to allow for more shoulder room.
The North Face Mountain 25 (interior space)

Adding to the livability of the Mountain 25, the two vestibules allow for a mostly gear-free living space. The main vestibule is poled and a generous 8 square feet, easily holding 2 packs (though be careful not to leave any damp gear in them). The second vestibule is a smaller 3 square feet, the perfect size for boots (we prefer to keep our hiking boots and ski boot liners with us in the tent, with chemical hand warmers so they don’t freeze), daypacks, and smaller items.

Within the tent there are 8 large mesh pockets that can hold books and maps, headlamps, mittens, socks, and anything else that you want close by. These pockets, along with the hanging loops for lights or damp clothing, also help keep the living space clutter free. In summary, the Mountain 25 is a well-sized 2-person tent, and an easy place to spend significant time in the darkness after the winter sun has set or while waiting out a storm. 
 

Build Quality and Durability

The adjective “bomber” already has been applied to the weather protection provided by this tent, and this is due to both its design and quality of materials used. The 40-denier nylon fly is thinner than previous versions of the Mountain 25, yet the newer version’s silicon-nylon (“silnylon”) fabric is less likely to break down, so it should outlast the already impressive previous models. The fully taped nylon bucket floor is a hefty 70 denier, which can be augmented with a footprint for those who are looking for extra durability on rough surfaces and okay adding some weight. We have not opted for a footprint because most of our camping is on snow.
The North Face Mountain 25 (logo)

The fly contains a PU window—for weather or northern lights checks—that reportedly has been cold-crack tested to -60F (we have yet to test that threshold!). In terms of poles, DAC is a highly regarded pole and stake manufacturer, and TNF did not shy away from including their best. Featherlite NSL aluminum tent poles are light yet exceedingly sturdy and able to withstand high forces without compromise. 

Truthfully, while we pamper our ultralight summer gear, we can be pretty rough with our winter equipment. Tear down typically is in freezing conditions and a fast and reckless process, and the tent gets dragged over rocks and stuffed into a backpack with little concern for wear and tear. Despite this level of abuse, The North Face Mountain 25 has held up to multiple expeditions with no signs of aging. 
The North Face Mountain 25 (pole clips)


Ventilation and Condensation

Condensation can be a big issue when winter camping, and ventilation and airflow are the most effective ways to reduce its formation. Therefore it is important that tents, and particularly those designed for cold temperatures, have both high and low venting to allow for proper air circulation. In terms of condensation prevention, double-wall tents like the Mountain 25 handily outperform single-wall designs like the Mountain Hardwear EV 2.

The newest version of the Mountain 25 has multiple venting options: the doors each have mesh, allowing for convective airflow (remember high school science? Warm air rises, but must be replaced with new air). Furthermore, the Mountain 25’s inner tent fabric is uncoated nylon and thus more breathable than many coated fabrics. The fly is held closely in place without touching the inner tent, providing a layer of insulation both for warmth and to further reduce the temperature differential on each side of the tent wall. This is yet another important means of reducing condensation.
The North Face Mountain 25 (vent)

We tend to leave our tent’s vents as open as possible—we’d prefer to bundle up in clothing and 4-season sleeping bags then deal with dampness, and found the Mountain 25’s venting options to be fantastic. Despite long nights in the tent in awful conditions, we have yet to have an issue with condensation. In the morning, there has been minor frost on the interior of the tent but nothing that has been bothersome. 
 

Set up and Take down

We have had tents (notably the Black Diamond Squall) for which we invariably spend time standing around helplessly holding poles and doing mental gymnastics to remember the exact sequence required for set up. Out of the bag, the Mountain 25 was different: the tent was intuitive and easy, even the first time. There are 5 color-coded poles that fit into a combination of pole sleeves (gold poles go in the gold sleeves, etc.) and clips. The poles then fit securely into grommets or eyelets. The fly attaches to the same grommets, which we found was relatively simple as long as we remembered to loosen the attached tension straps. When the fly is attached at all points, the grommets can then be tightened for a completely snug fit.
The North Face Mountain 25 (poles setup)

The guy line set up is quite clever and The North Face clearly has put a lot of thought into some small yet useful features. In total, there are 16 reflective Kevlar guylines with camming adjusters. Close to each corner of the tent, 3 guy lines converge into a small aluminum ring that acts as a pulley. This trio then easily can be adjusted so that they have equal tension at their desired length. We often get frustrated pitching a tent in rocky alpine terrain where it can be difficult to put multiple pegs in convenient places, but with this pulley-style system, it’s easy to customize the tension of each guyline and reduce the amount of pegging from essentially 12 to 4.
The North Face Mountain 25 (guyline)

We find that most tents do not include enough stakes, but the Mountain 25 comes with 16 DAC aluminum stakes as well as 4 snow stakes. While the later are a helpful addition for pegging the inner tent, in snow we tend to have no shortage of gear that can be used to secure the tent (shovels, ice axes, skis, poles, snow shoes) so we generally opt to use a combination of these for the fly. 

As with all tents, it’s best to complete set up with dexterous hands. One of us has issues with cold hands and typically is rendered useless in a hurry, making the pole sleeves a bit challenging. The pole sleeve design can allow the tent to become unruly during set up in high winds—it can become sail-like and get caught in the wind. Having said that, an extra person, even with large gloves on, can help hold the tent and poles in place in high winds. But all in all, we think the sleeve design is well worth the extra effort as it adds to sturdiness of the design and peace of mind while hiding out from the wind. 
The North Face Mountain 25 (set up)

Tear down is fast and easy, even for one person. It’s simply a matter of un-staking the corners, removing the poles, and shoving it all into its stuff sack or the bottom of a backpack. One of us easily completes this while the other deflates the sleeping mats
 

Weight

With a minimum trail weight of 8 pounds 8 ounces, The North Face Mountain 25 is far from the lightest 4-season tent on the market. For comparison, the climbing-centric Black Diamond Eldorado has a minimum weight of only 4 pounds 8 ounces, although it’s a single-wall tent that compromises on space and breathability. A double-wall, 4-season tent with more features like the Hilleberg Jannu has a minimum weight of 6 pounds 2 ounces, but it is very expensive at over $900. And the Mountain 25 does not compromise on strength or comfort, which are big upsides for some.

Personally, we have found that our tent priorities change significantly depending on the season or alpine objective. We prefer to travel quickly in warmer temperatures, and therefore the weight of our gear is paramount. In milder conditions, a leaky shelter might be uncomfortable and inconvenient, but probably will not be life threatening. Winter mountaineering brings with it a different set of priorities, and dependability and durability become primary concerns and override the desire for a lightweight tent.
The North Face Mountain 25 (logo 2)

For those who think like us and value the extra space, The North Face Moutain 25 is worth the extra weight. In addition to weather protection, comfort, storage, and ventilation all are excellent on the Mountain 25 and make winter camping with another person downright comfortable. You can go lighter, but this tent offers a nice compromise of weight, performance, and usability.
 

What We Like

  • Exceptional protection from the elements during serious winter storms.
  • Relatively roomy for a 2-person tent, including 2 doors and 2 vestibules.
  • Excellent ventilation and condensation prevention.
  • Easy set-up and take down, even the first time.


What We Don’t

  • Decently heavy at over 8 pounds minimum weight.
  • Overkill for mild weather.

The North Face Mountain 25 (interior)


Comparison Table

Tent Price Type Weight Height Floor Doors
The North Face Mountain 25 $589 Double wall 8 lb. 8 oz. 41 in. 32.3 sq. ft. 2
Mountain Hardwear Trango 2 $650 Double wall 8 lb. 15 oz. 38 in. 40 sq. ft. 2
Hilleberg Jannu $935 Double wall 6 lb. 2 oz. 39 in. 34.4 sq. ft. 1
Mountain Hardwear EV 2 $700 Single wall 4 lb. 10 oz. 41 in. 33 sq. ft. 1
Black Diamond Eldorado $700 Single wall 4 lb. 8 oz. 43 in. 30.8 sq. ft. 1


The Competition

The North Face Mountain 25 is a basecamp-style 4-season tent, meaning that it prioritizes build quality, space, and features over shaving ounces. Another popular basecamping option is the Mountain Hardwear Trango 2, which loses out to the Mountain 25 in peak height (38 vs. 41 inches), weighs 7 ounces more, and comes with a $60 increase in price. Both are high quality double-wall tents made to withstand really tough weather for extended periods, but the Trango does have a significant edge in floor space at 40 square feet vs. 32.3 square feet for the Mountain 25. In truth, they're both great options and the Mountain 25's cost savings could be the difference maker.

Swedish tentmaker Hilleberg brings to the table a number of very interesting 4-season double-wall options. In particular, the Hilleberg Jannu offers excellent strength-to-weight ratio at just 6 pounds 2 ounces minimum weight. However, the steeply sloped walls mean that two people sitting up at the same time is difficult (the walls do help make the tent more aerodynamic for wind protection). Perhaps most importantly, the Jannu is a whopping $935, well out of reach for many winter campers.

Jumping over to the single-wall side of the tracks, the Black Diamond Eldorado is among the lightest 4-season tents made at 4 pounds 8 ounces minimum weight. You do sacrifice quite a bit in terms of space, vestibules, breathability, and price, and keep in mind that the Eldorado really has solo alpinists in mind (or two small people at the most who don’t mind sleeping with their gear). But for those who value weight over all else, a feathery 4-season tent like the Eldorado (or even the Jannu above) is ideal for heading high into the alpine. We, however, put a higher value on the convenience and better all-around abilities of the Mountain 25, which stands out as a solid value for an expedition-worthy design.

 4-Season Tents

Best 4-Season Tents of 2017-2018

From backcountry ski tours to mountaineering in some of the most inhospitable weather on Earth, a 4-season tent is the last line of defense between you and the elements. Accordingly, these tents are much stronger...
Skiing 2015-2016

Ski Gear Reviews

If your ski gear is even a few years old, there’s new technology out there that will help make good days on the snow even better. There are important considerations when making a purchase...
Hilleberg Allak tent

Review: Hilleberg Allak

Hilleberg has set the bar high, creating some of the most finely tuned and well built tents on the market. Therefore we were extremely excited to test the Allak, a 2-person freestanding tent that falls into Hilleberg’s “Red Label” category...
MSR Remote 2 tent

Review: MSR Remote 2

The ideal 4-season tent is a delicate balance of roominess and comfort, ventilation, and extremely durable stormproof construction, all in a package that doesn’t weigh you down too much. With a short weekend on...
Arc'teryx Alpha SV hardshell jacket

Review: Arc'teryx Alpha SV

Arc’teryx is no stranger to hardshell jackets, and long has been a go-to option for protection from harsh weather. For the 2016-2017 season, they’ve updated their bomber Alpha SV with sturdier Gore-Tex, an innovative new zipper design, and...
Down Jacket (2017-2018)

Best Down Jackets of 2017-2018

Nothing beats a great down jacket, whether it’s for causal use or tearing around the backcountry. Below we break down the best down jackets of 2017-2018, including the top down sweaters, ultralights...
Ski Jackets

Best Ski Jackets of 2017-2018

From cold to snow to wind to sweat, choosing a ski jacket is all about managing the conditions that you might encounter on the mountain. The right ski jacket for you depends on the specific kinds of skiing you enjoy most—skinning up a sunny ridgeline...
MSR Access 3 tent

Review: MSR Access 3

Tent manufacturers constantly are pushing the limits of weight and weather protection, and 4-season tents designed to withstand harsh conditions tend to fall on the heavy side of the spectrum. Yet MSR essentially created a new category with their...
Hardshells

Best Hardshell Jackets of 2017-2018

Hardshell jackets are designed for the alpine: they’re highly windproof, waterproof, breathable, and durable. This is the outer layer you turn to for ultimate protection while backcountry and resort skiing...