Brand: UltrAspire
Category: Running Hydration Reservoirs
Recommended by Srulik Liberow, Ultrarunner / Strength Coach — New York
The Traverse Hydration Pack is engineered for endurance athletes seeking a lightweight, high-capacity solution for hydration and gear storage. With its innovative design and adjustable fit, it ensures comfort and stability during long-distance activities. 1. 20-liter capacity designed for optimal storage without bulk, perfect for long runs or hikes. 2. MaxO2 adjustable sternum system with dual vertical adjustment for a secure, bounce-free fit. 3. Large rear stash pocket with compression capability for easy access to essentials. 4. Externally accessible, insulated reservoir sleeve for quick hydration refills. 5. Symmetrical front pockets with dual bottle holders, featuring compression stitching for secure retention. 6. Two zippered top shoulder pockets for quick-access storage of small items. 7. Available in five sizes (Extra Small to Extra Large) to ensure a tailored fit for every user. The Traverse Hydration Pack is ideal for trail runners, hikers, and endurance athletes who require reliable hydration and gear management during extended outdoor activities. It excels in various environments, from rugged mountain trails to urban parks, making it suitable for year-round use. Designed for both novice and experienced users, this pack is perfect for races, long training sessions, or weekend adventures, ensuring you stay hydrated and organized no matter the distance.
Price: $224.95
- Who it's for
- Runners and fastpackers tackling 100-mile-plus or multi-day efforts, especially 200-mile races where carrying mandatory gear, layers, nutrition, and water simultaneously is required. Also noted as workable for crewed or non-crewed formats.
- What people are saying
- Hosts consistently praise the load capacity (one carried 11 lbs), weight distribution, and easy on-the-go access to pockets without awkward reaching. No criticism appears across the 13 notes — feedback is uniformly positive, though all notes come from UltrAspire athletes or sponsored runners.
- Worth noting
- Multiple hydration options (2L bladder or 1L bottles) and large front dump pockets with drawstrings are frequently called out. The endorser pool is heavily affiliated with UltrAspire, so independent critical perspective is absent.
Frequently asked questions
Who is the Traverse Hydration Pack for?
Runners and fastpackers tackling 100-mile-plus or multi-day efforts, especially 200-mile races where carrying mandatory gear, layers, nutrition, and water simultaneously is required. Also noted as workable for crewed or non-crewed formats.
What do experts say about the Traverse Hydration Pack?
Hosts consistently praise the load capacity (one carried 11 lbs), weight distribution, and easy on-the-go access to pockets without awkward reaching. No criticism appears across the 13 notes — feedback is uniformly positive, though all notes come from UltrAspire athletes or sponsored runners.
What should you know before buying the Traverse Hydration Pack?
Multiple hydration options (2L bladder or 1L bottles) and large front dump pockets with drawstrings are frequently called out. The endorser pool is heavily affiliated with UltrAspire, so independent critical perspective is absent.
More from Srulik Liberow's 10 Products I Actually Use
View Srulik Liberow's expert gear recommendations on Rendezvu
What other hosts are saying
14 experts recommend the UltrAspire Traverse Hydration Pack.
Kelsey McGill, Running Coach (Trail, Ultra, Road)
This is an incredibly compact yet spacious vest that I've been loving. This can be a great option for runners using crew or not using crew.
Recommended in Bigfoot 200
The absolute best pack for long trail races or adventures. Holds so much weight very comfortably. The giant pockets up front are so convenient for nutrition etc on the go!
Recommended in Cocodona Gear
Keifer Gilbert, Endurance Enthusiast, Adventurer, Coach, Father, Sober Dude
This pack is an absolute must have for multi day efforts, the storage capacity and design around the hydration system is beyond anything else in the market currently. I wore this at Cocodona and simplified so many things because of the capabilities of the pack.
Recommended in 10 Products I Actually Use
Abigail West, Ultrarunner, Artist, & New Mom
We took an epic fastpacking trip in Norway during my first trimester (great opportunity to slow down and take even MORE snack breaks!). The traverse was still in beta testing and I freaking LOVED it for storing all my gear and even some watercolor supplies!
Recommended in Pregnancy & Postpartum Training Essentials
THE pack of Cocodona in 2026.. 20L of storage, rock solid, check out my review video to see how much water you can carry!
Recommended in Best Vests
Amazing hydration pack for extended day trail race conditions. Fits like a dream, no chaffing and so versatile. Multiple bottle carrying options, from 2L bladder to 1 L bottles, you have plenty of additional room for nutrition, extra gear, lights and even a shoulder pocket for a tracker. My go to for long days on the trail.
Recommended in Winter Running gear
My favorite pack. Carried this for all of Cocodona 250 and all three days of Three days of Syllamo as a train up. I cannot say enough positive things about this pack. It's comfortable, accessable, useable, and useful! Easy access to all pockets on the go without being a contortionist. Large dump pockets along the sides with drawstring to keep stuff in. Carries a lot of water comfortably! Love this vest!
Recommended in 15 Products I Actually Use
I love this pack. It is built for 200+ mile distances and has all the specs for it.
Recommended in My 200+ Mile List
Rachel Bambrick, Ultrarunning coach & community leader
Used this in all my training for Wild Horse 200 and for the entirety of the race in 2026! Will be my go-to 200 mile pack from now on!
Recommended in Mammoth 200
Allison Powell, Ultrarunning Coach, Ultrarunning Communnity Leader
I was able to carry 11lbs of gear in this pack! All my food, warm layers, battery banks, and more, with ease!
Recommended in Tahoe-Yosemite FKT
Katie O'Connor, Ultra Trail Runner | Run Coach | Lover of all things RUNNING
This is THE BEST 200+ miler pack out there! Fits a ton, all the mandatory gear, plus fuel, and distributes the weight perfectly! Everything is easy to reach and easy to find!
Recommended in My 200+ Miler Gear List
Adam Williams, Ultra Trail Runner, Coach and Yoga Instructor
Definitely will have this beast ready to go for the longer segments.
Recommended in San Diego 200 (2026)
I am an ultraspire athlete and I got this pack as a prototype last year before their official release. I have worn it for the Summit 200, Maah Daah Hey 150, Crazy Mountain 100, and a few longer days in the mountains. This is my favorite pack that ultraspire has debuted. I will be wear it with confidence at any distance above 100 miles
Recommended in San Diego 200
