Most OCR athletes have figured out hydration. They’ve picked a vest, a handheld flask, or they’ve decided to survive on aid station water and whatever their mouth can produce. What far fewer athletes have figured out is the other half of the carry equation: how to get calories into your body, reliably, on a course that does not want you to have nice things.
Mid-race fueling is one of the most consistently underbuilt areas in OCR preparation. Athletes spend hundreds of hours planning their training and twenty minutes on their nutrition strategy. Then they get to mile eight of a twelve-mile race, their glycogen is gone, and they discover too late that their shorts have exactly one shallow pocket that couldn’t hold a gel without launching it into a mud pit somewhere around the cargo net.
The carry system matters. Here’s how to build one that works.
Why OCR Fueling Carry Is Harder Than It Looks
Running a road marathon, you can tuck gels into a waistband, tape them to your forearm, or grab them from a crew at mile twenty. None of those options survive an OCR course intact. You’re crawling under barbed wire, dunking through ice water, climbing cargo nets, swinging across monkey bars, and dragging weighted implements across uneven terrain. Everything you’re carrying gets tested in ways that race directors of road events never had to consider.
The typical failures look like this: gels fall out of shallow pockets during a crawl obstacle. Wrappers become impossible to open with wet, muddy hands. The pocket placement on standard running shorts puts gels directly under a weight vest or pack hip belt, making them inaccessible mid-race. Athletes who tape gels to their forearms lose them in water obstacles. Athletes who stuff gels into their sports bra discover that mud doesn’t care about that plan either.
The solution is a carry system designed specifically for the movement patterns of OCR — not borrowed from road running, not improvised from cycling, but purpose-built for the sport.
Race Belts: The Most Versatile Starting Point
A good race belt is the foundation of an OCR fueling system. At its most basic, it’s a low-profile waistband that sits on your hips and carries nutrition without bouncing, rotating, or interfering with obstacle movement. The key performance criteria for OCR:
- Stays put during crawls and climbs. A belt that rides up under your ribs the moment you go horizontal is useless. Look for silicone grip strips on the inner band or an adjustable buckle system that locks position without requiring a tight cinch.
- Keeps gels accessible with one hand. You often can’t stop on course. You need to be able to reach the gel, tear it open, and consume it while moving. A belt with individual gel loops holds each packet in a fixed orientation so you’re not digging through a pouch.
- Doesn’t interfere with layering. In fall and winter racing, you may be wearing a base layer, a mid-layer, and a race vest on top. A slim-profile belt fits under or over that stack without creating pressure points.
- Quick-dry material. You’re going to be submerged. Neoprene and thick nylon take hours to dry and become uncomfortable quickly. Thin elastic or mesh belts recover fast and don’t hold water weight.
A race belt with four to six dedicated gel loops covers the fueling needs of most OCR athletes for distances up to a Beast or a comparable 20K event. Beyond that, you’re in territory where a hydration pack with storage pockets is probably warranted anyway.
Gel Loops vs. Integrated Pouches
There are two dominant designs in OCR-compatible carry systems, and they make a meaningful practical difference.
Gel loop systems hold each gel individually, exposed, in a dedicated elastic loop. The advantages: you can see exactly how many you have left, each gel stays in a consistent orientation, and you can grab and open with one hand in motion. The disadvantage: gels can pop loose during high-impact obstacles — particularly cargo net climbs and anything that involves significant upper-body compression.
Integrated pouch systems use a zippered or velcro-sealed pocket. The advantages: nothing falls out, the carry profile is lower, and you can fit irregular-shaped nutrition (chews, bars, real food) that won’t work in a gel loop. The disadvantage: dexterity under race conditions. Opening a zipper with cold, muddy, wet hands is harder than it sounds. Velcro closures pick up debris and lose grip strength over the course of a muddy race.
The optimal OCR solution, used by most experienced athletes, is a hybrid: gel loops for your primary race fuel (maximum three or four gels at a time, easy access) paired with one small zippered pocket for backup nutrition, an emergency salt tab, and your car key.
The Skeptic’s View on Fueling on Course
Not every OCR athlete needs a fueling system. That’s worth saying directly. For a Sprint-distance race under five miles, the argument for carrying nutrition is weak — you’re not out there long enough for glycogen depletion to become a limiting factor for most athletes, and the complexity of managing a carry system adds friction that isn’t worth the marginal benefit.
Where the calculus shifts is the Super and Beast distances, and anything over ninety minutes of sustained effort. At that point, not fueling is a choice with measurable consequences — slower muscle contraction, degraded decision-making on technical terrain, and higher penalty rate on late-course obstacles as fine motor control deteriorates with fatigue. A well-placed 100-calorie gel at mile five of a Beast is not optional nutrition. It’s maintenance.
The skeptical view also extends to gel loops specifically: they add visual and physical bulk, and some athletes find them mentally distracting or aesthetically objectionable in a race context. That’s a legitimate preference. A well-designed race shorts pocket — some OCR-specific running shorts now come with narrow side pockets sized exactly for standard gel packets — can achieve a similar result with less hardware. Know your obstacle set and test your carry method in training before you trust it on race day.
Chews, Bars, and Real Food: When Gels Aren’t the Answer
Standard energy gels work for most athletes but not all. Athletes with sensitive GI systems often find that the concentrated fructose-glucose blend in standard gels is a course disaster waiting to happen — especially on longer races with significant cardiovascular stress that diverts blood from the digestive system. For those athletes, the carry system question extends to what you’re carrying, not just how.
Energy chews (a firmer, more slowly digestible alternative to gels) work well in a zippered pouch and can be consumed a piece at a time across a longer effort. Real food — dates, banana pieces sealed in a small zip bag, rice cakes — performs surprisingly well for athletes who have trained their gut to accept whole-food fuel during hard efforts. It requires a pouch rather than gel loops, but it’s a valid strategy and one that avoids the GI chaos that sidelines athletes mid-race every weekend across the country.
Test everything in training. The race course is the wrong place to discover that a particular gel brand causes cramps at mile nine.
The Bottom Line
A race belt with gel loops is one of the cheapest and most impactful gear upgrades an OCR athlete can make — and one of the most commonly overlooked. You can spend significant money on shoes, compression, and hydration systems and still show up to the back half of a Beast with no fuel strategy and no way to carry one. Build the system deliberately. Test it in training across the movement patterns you’ll face on course — crawls, climbs, water. Know what you’re carrying, where it is, and how to access it under real race conditions. Then fuel on schedule, not when you feel like it. Feelings are a lagging indicator. By the time you feel depleted, you already are.
Find the Gear
Shop race belts, gel loops, and fueling accessories on Amazon to build your OCR carry system.
- Race Belts with Gel Loops
- Energy Gels for Endurance Racing
- Running Shorts with Built-In Gel Pockets
- Energy Chews for Endurance Athletes
- Compact Running Waist Pouches
Wall & Wire is an independent OCR media outlet. We may earn affiliate commissions from purchases made through the links in this article, but our recommendations are based on what actually performs on OCR courses.
This article was researched with the help of AI tools and reviewed and edited by Hilton Campbell. Original reporting and quotes are our own.