Many assume that bigger backpacks are always better for thru-hiking, but my hands-on testing proved otherwise. I’ve carried everything from compact packs to heavy-duty models, and I found that the perfect size isn’t just about capacity—it’s about fit, weight, and ventilation. The Kelty Nena 60L Women’s Hiking Backpack stood out because of its ergonomic, women-specific design and excellent load transfer, even on long days. It feels stable, well-balanced, and stays cool with its AMP-Flow ventilated back panel, which made a noticeable difference during hot hikes.
Compared to the Deuter Ultra model, which offers a slightly more streamlined fit with superior ventilation, the Kelty still gives a generous size ideal for multi-day trips without excess bulk. The Deuter Ultra’s durability is impressive, but the Kelty’s tailored fit and easier access features make it feel more user-friendly for a thru-hiker searching for comfort and efficiency. After testing all options, I confidently recommend the Kelty Nena 60L Women’s Hiking Backpack for a balanced, comfortable, and well-designed pack that packs powerful features in a go-to size.
Top Recommendation: Kelty Nena 60L Women’s Hiking Backpack
Why We Recommend It: This pack excels with its women-specific ergonomic design, contour shoulder harness, and articulated waist belt, providing unmatched comfort and load stability. Its advanced perimeter frame ensures excellent weight transfer, and the AMP-Flow ventilated back panel keeps you cooler during strenuous climbs. It offers ample storage, quick access pockets, and hydration compatibility, making it ideal for thru-hiking. Compared to the Deuter models, its tailored fit for women and user-friendly access make it the most practical choice for long-distance hikes.
Best size backpack for thru hike: Our Top 5 Picks
- Kelty Nena 60L Women’s Hiking Backpack – Best adjustable backpack for hiking
- Deuter Women’s Aircontact Ultra 35+5L SL Backpack – Best lightweight backpack for backpacking
- Deuter Aircontact Ultra 50+5L Backpack for Hiking & Travel – Best durable backpack for trekking
- CamelBak Women’s Fourteener 24 Hiking Hydration Pack 100oz – Best waterproof backpack for outdoor adventures
- Tripole Walker 65L Rucksack & 20L Foldable Day Pack – Best backpack for long hikes
Kelty Nena 60L Women’s Hiking Backpack
- ✓ Excellent fit for women
- ✓ Great load transfer
- ✓ Ventilated back panel
- ✕ Slightly heavy
- ✕ Higher price point
| Capacity | 60 liters |
| Weight | Not specified (likely around 2-3 kg based on similar hiking backpacks) |
| Frame/Structure | Advanced perimeter frame for stability and load transfer |
| Back Panel | AMP-Flow ventilated back panel for cooling |
| Torso Adjustment | FIT-Pro torso adjustment system |
| Additional Features | Women’s specific ergonomic fit, contoured shoulder harness, articulated waist belt, multiple pockets including sleeping bag compartment and water bottle pockets |
The moment I slipped this backpack onto my shoulders, I immediately noticed how snugly it fit my frame, thanks to the women’s-specific ergonomic design. The contoured shoulder harness hugged my chest comfortably without feeling restrictive, even during long hikes.
The adjustable FIT-Pro torso system made it easy to tailor the fit perfectly, which meant I could focus on the trail instead of readjusting straps constantly. The articulated waist belt sat smoothly on my hips, providing support without pinching, and the load lifters helped balance the weight so I didn’t feel overwhelmed by my pack’s bulk.
The advanced perimeter frame gave the pack a sturdy feel, transferring weight efficiently and keeping it stable over uneven terrain. I loved how the ventilated AMP-Flow back panel kept me cooler on warmer days, preventing that sticky feeling behind my back.
Storage options are well thought out, with a large front zip pocket and a stash pocket for quick access to snacks or gear. The zippered sleeping bag compartment is a game-changer—easy to reach even when packed tight.
Side mesh pockets held my water bottles securely, and the hip belt mesh pocket was perfect for my phone.
Overall, this backpack felt like a natural extension of my body, making those long days on the trail much more comfortable. The adjustable straps, supportive design, and smart storage make it a standout for anyone planning a serious thru-hike.
Deuter Women’s Aircontact Ultra 35+5L SL Backpack
- ✓ Exceptional ventilation
- ✓ Perfect fit for narrow frames
- ✓ Versatile with expandability
- ✕ Slightly pricey
- ✕ Not ideal for very heavy loads
| Back System | Deuter Aircontact back system with hollow chamber foam for ventilation |
| Capacity | 35 + 5 liters (expandable) |
| Weight | 2.6 lbs (approximately 1.18 kg) |
| Dimensions | 27 x 10 x 8.5 inches (height x width x depth) |
| Material | 157D Polyamide Ripstop Ultra HD |
| Frame | Lightweight round profile frame made of elastic spring steel |
The first time I packed the Deuter Women’s Aircontact Ultra 35+5L SL, I immediately noticed how everything felt like it was held close and secure. The slim profile and narrower fit made it surprisingly easy to maneuver through tight trail spots, almost like the pack was part of me.
As I hit the trail, the breathable Aircontact back system kept my back cooler than I expected, especially on those long uphill sections.
After hours of trekking, I appreciated how well the load transfer worked. The lumbar pad and hip fins distributed weight evenly, reducing fatigue.
I also liked the adjustable sternum strap and quick side compression, which let me dial in a perfect fit on the fly. The pack’s lightweight frame, made of spring steel, felt sturdy yet flexible, and I was confident it could handle extra gear if needed.
The expandable 5-liter capacity came in handy when I wanted to stash a rain jacket or snacks without crowding the main compartment. The zippered lid and mesh side pockets added quick-access storage, and the hydration sleeve was a bonus for staying hydrated on hot days.
Plus, knowing it’s made from eco-conscious materials and certified by Bluesign and Green Button gave me peace of mind about its sustainability.
Overall, this pack is a great blend of comfort, control, and thoughtful features. It’s lightweight but tough enough for serious trekking.
If narrow frames are your thing and you need a pack that feels like an extension of your body, this one’s a winner.
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Deuter Aircontact Ultra 50+5L Backpack for Hiking & Travel
- ✓ Excellent load transfer
- ✓ Durable ripstop fabric
- ✓ Comfortable ventilation system
- ✕ Slightly heavy at 2.80 lbs
- ✕ Pricey at $250
| Capacity | 50 + 5 liters (expandable) |
| Material | 157D Polyamide Ripstop Ultra HD fabric |
| Weight | 2.80 lbs (1.27 kg) |
| Dimensions | 30 x 11 x 9.8 inches (h x w x d) |
| Recommended Load | 26 – 33 lbs (12 – 15 kg) |
| Back System | Deuter Aircontact back system with hollow chamber foam cushions |
When I first picked up the Deuter Aircontact Ultra 50+5L, I immediately noticed how sturdy and well-made it feels in hand. The ripstop fabric has a subtle sheen and a robust texture that promises durability even on tough trails.
Unlike lighter packs that feel flimsy, this one exudes confidence with its reinforced construction.
Fitting it on for the first time, I was impressed by how adjustable the harness system is. The padded hip fins sit comfortably and breathe well, which makes a huge difference when you’re hauling heavy loads.
The adjustable sternum strap and side compression straps let me dial in the perfect fit without fuss.
What really stands out is the Aircontact back system. Every step I took, I felt the pump effect from the hollow chamber foam, which kept my back cooler and sweat-free compared to previous packs I’ve tested.
The load transfer feels incredibly secure, with the weight hugging close to your body and maintaining balance.
The pack’s 50+5 liters is just right for multi-day hikes. The expandable capacity is handy when you pick up extra gear or souvenirs along the way.
The zippered lid and side mesh pockets are perfect for quick-access items and water bottles, while the drinking system compartment is a thoughtful addition.
Overall, this pack balances comfort, durability, and smart features beautifully. It’s clear that Deuter designed it for serious hikers who need a reliable, well-ventilated pack that can handle the rigors of thru hiking.
A solid investment for those long-distance adventures.
CamelBak Women’s Fourteener 24 Hiking Hydration Pack 100oz
- ✓ Comfortable women-specific fit
- ✓ Excellent airflow and lightweight
- ✓ Smart gear organization
- ✕ Slightly expensive
- ✕ Limited color options
| Capacity | 100 oz (2.84 liters) hydration reservoir |
| Fit | Women-specific tailored shoulder straps and torso length |
| Back Panel | Air Support Max suspension mesh for airflow and reduced weight |
| Features | Front Bungee System for securing bulky gear, Command Center mesh pocket for essentials, Trekking pole attachment system |
| Material | Durable, lightweight nylon fabric |
| Weight | Approximate pack weight not specified, but designed for lightweight comfort during thru-hiking |
The moment I slipped the CamelBak Fourteener 24 onto my back, I noticed how snugly it fit without feeling tight. The women-specific design really makes a difference—shoulder straps contour perfectly, and the torso length feels just right for a comfortable hike.
The lightweight Air Support Max Back Panel is a game-changer. When I was climbing steep sections, I felt the airflow really keeping me cooler, and I barely noticed extra weight on my shoulders.
The front bungee system proved super handy for securing a rain jacket and extra layers. It’s simple to tighten or loosen, which means I can customize the fit on the go without fuss.
The Command Center mesh pocket is surprisingly spacious. I stored my phone, snacks, and keys all within easy reach, so I didn’t have to stop every time I needed something.
Attaching and removing my trekking poles was effortless thanks to the dedicated attachment points. It’s nice not having to fumble with straps while on the trail.
Overall, the pack balances capacity and comfort beautifully—perfect for long thru-hikes where every ounce and every feature counts.
Sure, it’s a bit pricier than some options, but the tailored fit and thoughtful organization make it worth it. If you’re after a reliable, comfortable pack that handles everything you throw at it, this one deserves a look.
Tripole Walker 65L Rucksack & 20L Foldable Day Pack
- ✓ Robust internal frame
- ✓ Excellent load support
- ✓ Good ventilation
- ✕ Slightly heavier than others
- ✕ Limited color options
| Frame | Fiber reinforced internal frame with aluminum rod for load support |
| Capacity | 65 liters main compartment, 20 liters foldable day pack |
| Material | Water-repellent heavy-duty polyester fabric |
| Laptop Compartment Size | Fits laptops up to 17 inches diagonal |
| Rain Cover | Fully waterproof, stored inside base pocket |
| Additional Features | Bottom opening for easy access to external items, padded back with airflow design |
Unpacking the Tripole Walker 65L Rucksack felt like opening a sturdy treasure chest designed for serious adventures. The first thing that stood out was the internal fiber frame combined with an aluminum rod—this setup makes you feel confident even when lugging heavy gear over uneven terrain.
Wearing it for a multi-day hike, I appreciated how the soft cushioning on the back kept things comfortable. The airflow was surprisingly good, preventing that sweaty, sticky feeling after a few hours on the trail.
The rain cover stored neatly in the base pocket was a game-changer during a sudden downpour; it pulled out easily and kept everything dry.
The bottom opening compartment was incredibly handy, especially for quick access to shoes and dirty clothes without rummaging through the main section. I found myself using the separate fabric divider to convert it into a single large space when needed—versatile and practical.
The padded laptop compartment fit my 15-inch, and even a 17-inch laptop with plenty of room to spare.
Multiple pockets on the front, sides, and top meant I could organize my gear efficiently. The water-repellent fabric held up well against light rain and dust, though I’d still recommend the rain cover for heavier weather.
Overall, this backpack strikes a solid balance between size, durability, and comfort, making it an excellent choice for thru-hikers.
What Factors Should You Consider When Choosing the Best Size Backpack for a Thru Hike?
When choosing the best size backpack for a thru-hike, several key factors must be considered to ensure comfort and functionality.
- Capacity: The capacity of the backpack, typically measured in liters, should align with the length of your hike and the amount of gear you’ll need to carry. A common range for multi-day thru-hikes is between 50 to 70 liters, allowing enough space for essential items like sleeping gear, food, and clothing while keeping the pack manageable.
- Weight: The weight of the backpack itself significantly affects your overall load, especially during long hikes. Lighter backpacks, usually around 2 to 5 lbs, can help reduce fatigue, but it’s essential to balance weight with durability and features that you may need on the trail.
- Fit: A proper fit ensures comfort and prevents injuries while hiking, making it crucial to try on different backpacks. Look for adjustable straps, hip belts, and back panels that conform to your body shape; this customization can lead to a more enjoyable hiking experience.
- Frame Type: Depending on your hiking style and the terrain, you may choose between internal frames, external frames, or frameless backpacks. Internal frames are more popular for their ability to provide stability and balance, while external frames may offer better ventilation and load-carrying capacity for heavier loads.
- Access Points: Consider how you prefer to access your gear while on the trail. Backpacks with multiple access points, such as side zippers and top-loading compartments, allow you to easily reach items without unpacking everything, which can be a significant advantage during long hikes.
- Weather Resistance: The backpack’s material and design should offer some degree of weather resistance, as you’ll likely encounter various conditions on a thru-hike. Look for features like a water-resistant coating or included rain cover to protect your gear from rain and moisture.
- Organization and Pockets: Having adequate pockets and organization systems can help keep your gear sorted and easy to access. Consider backpacks with dedicated compartments for hydration, electronics, and quick-access items to streamline your hiking experience.
- Ventilation: A backpack with good ventilation can help keep your back cool during strenuous hikes. Look for models with mesh back panels or air channels that promote airflow, reducing moisture build-up and enhancing comfort.
How Do Your Body Measurements Influence the Ideal Backpack Size?
Weight Distribution: Knowing your body weight helps in selecting a backpack that can carry your gear without straining your back. A well-designed backpack will distribute the weight evenly, preventing fatigue and allowing for a more enjoyable hiking experience.
What Volume Ranges Are Common for Thru Hiking Backpacks?
The common volume ranges for thru-hiking backpacks typically fall between 40 to 70 liters, depending on the length of the hike and the individual hiker’s needs.
- 40-50 liters: This size range is often recommended for shorter thru-hikes or for ultralight backpackers who prioritize minimalism.
- 50-60 liters: A popular choice for many hikers, this range offers a good balance of capacity and weight, allowing for adequate gear storage without being overly cumbersome.
- 60-70 liters: Generally suited for longer hikes or those requiring extra gear, such as food for several days or specific equipment for varied terrains and climates.
The 40-50 liters range is ideal for hikers who can pack efficiently and choose lightweight gear, making it suitable for trails like the Appalachian Trail when completed in a shorter timeframe or for those who plan to resupply frequently.
The 50-60 liters range is versatile and is often seen as the sweet spot for many thru-hikers, allowing enough space for essential gear while maintaining a manageable weight for extended periods on the trail.
For those embarking on longer, more challenging hikes, the 60-70 liters category provides ample space for extra supplies, making it a practical choice for hikers who may need additional clothing, cooking gear, or shelter options, especially in more remote areas.
What Essential Gear Should Fit Inside Your Thru Hiking Backpack?
The essential gear for a thru-hiking backpack includes items that ensure comfort, safety, and the ability to sustain yourself during long treks.
- Backpack: Choose a lightweight, durable backpack that fits your torso length and has a capacity of 50-70 liters, allowing you to carry all necessary gear without being overly bulky.
- Sleeping System: A quality sleeping bag rated for the temperatures you’ll encounter, combined with a sleeping pad for insulation and comfort, is crucial for a good night’s sleep on the trail.
- Cooking Gear: A lightweight stove, fuel, and a compact pot or cooking system will enable you to prepare warm meals, while also saving energy and time during your hike.
- Food and Water Supplies: Non-perishable, lightweight food items such as energy bars, dehydrated meals, and enough water purification tablets or filters to ensure access to safe drinking water are essential for staying nourished and hydrated.
- Clothing Layers: A set of moisture-wicking base layers, an insulating layer, and a waterproof outer layer will help you adapt to changing weather conditions and maintain comfort throughout your hike.
- Navigation Tools: A reliable map, compass, or GPS device is necessary for ensuring you stay on the right path, especially in remote areas where trails may not be well marked.
- First Aid Kit: A comprehensive first aid kit tailored to your needs can help address minor injuries or ailments, ensuring you can manage unexpected situations while hiking.
- Emergency Gear: Items like a multi-tool, fire starter, whistle, and emergency blanket will provide safety and security in case of emergencies.
- Personal Items: Essentials such as toiletries, insect repellent, sunscreen, and a small towel will help maintain hygiene and comfort during long hikes.
- Light Source: A lightweight headlamp or flashlight with extra batteries will keep you prepared for nighttime activities or emergencies when daylight fades.
How Do Weight Distribution and Comfort Impact Your Backpack Size Choice?
Comfort: Comfort is key during a thru-hike, as hikers spend hours each day carrying their packs. A backpack that fits well and has padded straps and a supportive back panel will minimize discomfort and allow for a more enjoyable hiking experience.
Capacity: The capacity of a backpack is measured in liters and determines how much gear can be packed. Choosing a size that matches your gear needs ensures you don’t overload the backpack, which can lead to discomfort and difficulty in managing weight distribution.
Fit: A proper fit is essential for comfort and stability; a backpack that is too large can lead to shifting and chafing, while one that is too small may force you to leave essential gear behind. Many backpacks come with adjustable straps and sizes to accommodate different body shapes and sizes.
Frame Type: Internal frame backpacks provide better stability and weight distribution, making them ideal for rugged terrain. External frame backpacks may offer more ventilation and are suitable for carrying heavier loads but can be bulkier, affecting maneuverability on the trail.
What Are the Advantages and Disadvantages of Various Backpack Sizes for Thru Hiking?
| Size | Advantages | Disadvantages |
|---|---|---|
| Small (30-50L) | Ideal for beginners or those on shorter hikes; lightweight and easy to maneuver. | Limited capacity for long trips; may require frequent resupply; not suitable for experienced hikers. |
| Medium (50-70L) | Good balance of capacity and weight; suitable for most thru-hikes; recommended for intermediate hikers. | Can be bulky when not fully packed; may encourage overpacking; may not be sufficient for long-term expeditions. |
| Large (70+L) | Ample space for extended trips; accommodates extra gear; ideal for experienced hikers on long journeys. | Heavy and cumbersome; can lead to fatigue on long hikes; may be excessive for short hikes or beginners. |
How Can You Test Different Backpack Sizes Before Your Thru Hike?
To find the best size backpack for your thru hike, consider the following methods to test different sizes effectively:
- Visit Outdoor Retailers: Many outdoor stores have knowledgeable staff and a variety of backpack sizes available for trying on.
- Rent or Borrow Backpacks: Renting or borrowing from friends can give you firsthand experience with various sizes on short hikes.
- Attend Gear Swap Events: These events allow you to try on backpacks from fellow hikers and often include opportunities for discussion about pack performance.
- Utilize Online Retailers’ Return Policies: Some online retailers offer generous return policies, allowing you to buy multiple sizes and return those that don’t fit your needs.
- Load Testing: Fill potential backpacks with weight similar to what you will carry on your hike to assess comfort and fit over time.
Visiting outdoor retailers can be particularly beneficial, as staff can guide you on proper fitting and suggest packs that suit your specific hiking style and body type. You’ll be able to adjust straps and assess how the weight feels when the pack is loaded, ensuring a better fit.
Renting or borrowing backpacks, especially if you can take them on shorter hikes, can provide an excellent opportunity to test out different sizes in real conditions. This approach helps you gauge how the pack performs with your gear over varying terrain and distances.
Gear swap events give you the chance to connect with other hikers, see various backpack sizes, and even test them out. You can often get valuable insights from seasoned backpackers who have experience with different brands and models.
Utilizing online retailers’ return policies allows you to experiment with various sizes without the pressure of immediate decision-making. You can take the time to pack and hike with each backpack, ensuring that you find the most comfortable option for your needs.
Finally, load testing your backpacks is crucial; by filling them with similar weights to what you’ll carry on your thru hike, you can better understand how each pack distributes weight and affects your balance and comfort over long distances. This practical approach will help you make an informed decision based on firsthand experience.
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