High-altitude trail runs turn simple tasks into ordeals. Reaching for a base layer often yields a flattened peanut butter sandwich or a Ziploc of toilet paper instead. By the time the right item appears, poles have fallen, sternum straps have loosened, and shoulders ache from awkward movements.
Raide Research, a Colorado-based brand specializing in backcountry ski packs, created a vest to address these challenges. The LF 5L is a 5-liter running vest built for extended trail adventures, emphasizing organization and stability.
The back pocket that keeps items secure
The LF 5L’s standout feature is its divided back pocket. Rather than a single large compartment, it splits into two sections—one for poles, another for an extra water flask. Both are held in place with elastic loops to prevent shifting during descents or scrambles. Below these, a stretchy passthrough pocket with grip-dot lining holds layers or nutrition without bounce.
While testing, I stuffed a long-sleeve tee, a lightweight shell, and two gel pouches into this section with room to spare, and, more importantly, without any bounce.
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The front includes two standard flask pockets (600mL Raide-branded flasks come included), two stretchy stash pockets for gels, and a zippered pocket sized for an iPhone with an internal key ring. Side panels provide extra space for used gels or wrappers.
Fabric and fit designed for movement
The sternum straps differ from most vests. Raide’s version uses inelastic nylon sewn directly into the bottle pockets, creating a tensioned fit that stays secure over long distances.
Intended users and alternatives
The LF 5L is Raide’s largest trail running pack, built for long runs or alpine adventures where extra water, layers, and tools are necessary. It includes an ice-tool loop for serious climbs, though most runners won’t use it.
For shorter or faster runs, Raide offers two belts: the LF 2L and UL 1L. The 2L belt carries water, a lightweight layer, and poles without shoulder straps, while the 1L belt is a minimalist option for phone, keys, and gels.
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The LF 5L is currently sold out at Raide, Backcountry, and Huckberry. Interested buyers can sign up for restock alerts.
If the LF 5L isn’t available, Raide’s smaller packs or alternatives like the Nathan Sports QuickStart 3.0 may work. For runners who value organization and stability on big mountain days, the vest sets a new benchmark—when it’s in stock.
Most trail runners spend more time untangling poles than designing better gear.
