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Pickle Juice for Ultrarunning
Ultras are long enough that the body works through its whole range in a single day. You start fresh, fueled, dialed. Somewhere in the back half, things change. The legs are deep into fatigue, you've lost more fluid and salt than you've taken in, and the cramp that shows up at mile 60 is a different animal than a cramp on a track.
This is a note about where a small tool fits into that long arc. Not a fueling plan, not a hydration strategy. Those are bigger jobs and you should have them handled. This is about the moment a cramp shows up anyway.
Why cramps show up late
The cramp in an ultra is rarely a mystery. It's the back half doing what the back half does. Hours of repetitive load, accumulated fatigue in the working muscles, fluid and sodium running steadily negative no matter how well you drank. The current research leans toward cramps being a problem of overworked, fatigued neuromuscular control more than a simple salt deficit, and an ultra is a machine built for exactly that kind of fatigue.
Which means the cramp often arrives when you've done everything right. You drank. You ate. You salted. And at hour nine the calf locks up anyway on a climb you've done a dozen times. That's not a failure of preparation. That's the distance.
Where the sweet drinks stop helping
Most ultra fueling runs on sugar: gels, carb drinks, the sweet stuff that keeps the engine turning. It works, and you need it. But a lot of runners hit a point in the back half where one more sweet thing turns the stomach, and that's usually the same window the cramps arrive in.
Pickle brine is the opposite flavor. Sharp, sour, salty. For a lot of runners that's a relief by itself late in a race, a flavor that cuts through the sugar fatigue. And it does a different job than the carb drink: the carb drink fuels, the brine interrupts the cramp. They aren't competing. They're two different tools for two different problems that happen to land in the same hour.
How it rides in a vest
This is the easy part for ultrarunners, because you're already carrying the answer. A vest with soft flasks, a few pockets, room for the day. A stick of powder weighs almost nothing and tucks into a pocket you're not using. No jar to leak, no bottle of brine sloshing against your chest for fifty miles.
When the cramp shows up, you mix a stick into a few ounces of water in a flask or a cup at an aid station and take it. A small, concentrated dose is the point. You're not trying to drink a lot. You're trying to interrupt the misfire and buy a window to keep moving.
Some runners take it at the first twitch, the early warning before a full cramp locks in. Others keep one in a drop bag for the late miles where they know from experience the wheels tend to come off. Both work. The tool is most useful when you've already thought about when you'll reach for it, rather than fumbling for it mid-cramp on a dark trail.
What it does not do
It won't fix the cause. The fatigue that produced the cramp is still there, and the cramp can come back. What the reflex buys you is a window, a few minutes of quiet to back off the pace, eat something, get on top of your fluids, and let the worst of it pass. In an ultra, that window can be the difference between walking it in and a long sit on a rock.
And it isn't your hydration. Over a day that long you'll move through liters of fluid and a lot of sodium, and a few ounces of brine doesn't touch that math. Handle the big job separately. The brine is for the moment, not the day.
A single stick of Quickle carries 700mg sodium, 300mg potassium, and 50mg magnesium, plus the real vinegar that does the fast work. It mixes small, rides light, and stays in a vest pocket until the mile you need it. For the long days, that's the whole pitch.
- Hoffman, M. D., & Stuempfle, K. J. (2015). Muscle cramping during a 161-km ultramarathon. Sports Medicine - Open, 1, 19. Cramping involved the most-worked muscles and tracked with muscle damage, not hydration or sodium status.
- iRunFar. Troubleshooting on the run. A practitioner guide noting that stomach trouble is a leading cause of ultra DNFs and that pace drives late-race lower-body fatigue.
- Schwellnus, M. P. (2009). Cause of exercise associated muscle cramps (EAMC): altered neuromuscular control, dehydration or electrolyte depletion? British Journal of Sports Medicine, 43(6), 401-408.
- Craighead, D. H., et al. (2017). Ingestion of transient receptor potential channel agonists attenuates exercise-induced muscle cramps. Muscle & Nerve, 56(3), 379-385.
Quick answers.
When should I take pickle juice during an ultra?
At the first sign of a cramp, the early twitch before it locks in, or in the back half where you know from experience cramps tend to show up. A small concentrated dose mixed into a few ounces of water is the goal. Thinking through when you'll reach for it beforehand beats fumbling for it mid-cramp.
Does pickle juice replace my hydration and fueling in an ultra?
No. Over a day that long you move through liters of fluid, a lot of sodium, and a steady stream of carbs. A few ounces of brine doesn't cover any of that. It works on the cramp moment through a nerve reflex. Keep your fueling and hydration plan separate and bigger.
Why do cramps show up so late in long races?
The back half stacks hours of repetitive load, deep muscle fatigue, and a steady fluid and sodium deficit. Research leans toward cramps being a problem of fatigued neuromuscular control more than simple salt loss, and an ultra produces exactly that fatigue. A late cramp usually means you went far, not that you prepared wrong.
How do I carry it on a long run?
A single-serve stick weighs almost nothing and tucks into a vest pocket or a drop bag. There's no jar to leak or bottle of brine to slosh. Mix it into a few ounces of water in a flask or cup when you need it.
Will it stop cramps from coming back?
No. It interrupts the active cramp but doesn't fix the fatigue that caused it, so a cramp can return. What it buys you is a window to back off the pace, refuel, and get on top of your fluids before the worst of it returns. In a long race, that window matters.
