Brand: UltrAspire
Category: Running Hydration Reservoirs
Recommended by Mike @HumbleRunning, Shoe and Gear Reviews — Boise, Idaho
Highlights: comfortable
The Traverse Hydration Pack is designed for endurance athletes seeking a lightweight, high-capacity solution for hydration and gear storage. With its innovative fit and ample storage options, it ensures you stay comfortable and organized during long runs or races. 1. 20-liter capacity provides ample space for hydration and essential gear without bulk. 2. MaxO2 adjustable sternum system features dual vertical adjustments for a secure, bounce-free fit. 3. Large rear stash pocket with compression capability allows for quick access to gear on the go. 4. Externally accessible insulated reservoir sleeve simplifies refills and keeps water cool. 5. Dual bottle pockets with compression stitching ensure secure storage for hydration bottles. 6. Two zippered top shoulder pockets offer convenient access to small items during activities. 7. Available in five sizes (Extra Small to Extra Large) for a tailored fit to suit various body types. The Traverse Hydration Pack is ideal for long-distance runners, hikers, and outdoor enthusiasts who require reliable hydration and gear management. It excels in various environments, from rugged trails to urban settings, making it perfect for both training and race day. Designed for athletes of all skill levels, it performs best in warm weather conditions where hydration is crucial, ensuring you can focus on your performance without distractions.
Price: $224.95
- Who it's for
- Runners and fastpackers tackling multi-day or 200-mile-plus efforts who need high carry capacity with or without crew access. Notes also mention it works for shorter long days in the mountains.
- What people are saying
- Hosts consistently praise the storage capacity, comfortable weight carry (one carried 11 lbs), accessible front pockets, and hydration system design. Notes are overwhelmingly positive with no criticism recorded.
- Worth noting
- Multiple hosts wore it for 200-mile races (Cocodona 250, Wild Horse 200, Summit 200); one used it for fastpacking. Notes are one-sided — all 10 hosts are enthusiastic, several are UltrAspire athletes or received early prototypes.
Mike @HumbleRunning's review
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 by Mike @HumbleRunning, Shoe and Gear Reviews
Frequently asked questions
Who is the UltrAspire TRAVERSE 20L for?
Runners and fastpackers tackling multi-day or 200-mile-plus efforts who need high carry capacity with or without crew access. Notes also mention it works for shorter long days in the mountains.
What do experts say about the UltrAspire TRAVERSE 20L?
Hosts consistently praise the storage capacity, comfortable weight carry (one carried 11 lbs), accessible front pockets, and hydration system design. Notes are overwhelmingly positive with no criticism recorded.
What should you know before buying the UltrAspire TRAVERSE 20L?
Multiple hosts wore it for 200-mile races (Cocodona 250, Wild Horse 200, Summit 200); one used it for fastpacking. Notes are one-sided — all 10 hosts are enthusiastic, several are UltrAspire athletes or received early prototypes.
What does Mike @HumbleRunning say about the UltrAspire TRAVERSE 20L?
THE pack of Cocodona in 2026.. 20L of storage, rock solid, check out my review video to see how much water you can carry!
Why does Mike @HumbleRunning recommend UltrAspire?
Mike @HumbleRunning recommends the UltrAspire UltrAspire TRAVERSE 20L for running hydration reservoirs. THE pack of Cocodona in 2026.. 20L of storage, rock solid, check out my review video to see how much water you can carry!
Is the UltrAspire TRAVERSE 20L a good running hydration reservoir?
Yes — Mike @HumbleRunning recommends the UltrAspire TRAVERSE 20L by UltrAspire as their running hydration reservoirs pick. THE pack of Cocodona in 2026.. 20L of storage, rock solid, check out my review video to see how much water you can carry!
More from Mike @HumbleRunning's Best Vests
View Mike @HumbleRunning's expert gear recommendations on Rendezvu
What other hosts are saying
10 experts recommend the UltrAspire TRAVERSE 20L.
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
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 My Tried and True Favorites
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
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 10 Products I Actually Use
