Real Food for Ultras: What to Eat
Real Food for Ultras: What to Actually Eat Beyond Mile 30¶
Somewhere around hour six of a 100-miler, your body stages a mutiny against anything sweet. The gel you choked down at mile 25 was fine. The one at mile 35 was tolerable. By mile 45, the thought of another sticky packet of maltodextrin makes your throat close.
This is not weakness. It is biology. Researchers call it "sweet fatigue" -- a well-documented decline in appetite for sugar-based foods during prolonged exercise. And it is one of the primary reasons ultra runners who rely exclusively on gels and chews start falling behind on calories after 8 to 10 hours of racing.
The fix is not more willpower. It is more variety. Specifically, real food -- the kind you would recognize in a kitchen, not just a lab.
This guide covers the specific foods that experienced ultra runners eat during 50-mile and 100-mile races, when to transition from gels to solids, and how to set up a real food strategy that holds together for 20+ hours on your feet.
What you will learn:
- The top real foods that work during ultras (and why they work)
- When to shift from gels to solid food during a race
- How to set up your crew and drop bags for real food access
- What to grab at aid stations versus what to carry yourself
- A practical food timeline from start to finish of a 100-miler
Why Gels Stop Working After 6 Hours¶
Gels are efficient. They deliver fast carbohydrates with minimal digestion required. For a marathon or a short ultra, they are often all you need.
But ultramarathons are not marathons. When you run for 12, 20, or 30 hours, three things change:
Your palate revolts. Sweet fatigue is real and predictable. After hours of glucose and fructose, your brain starts rejecting sweet flavors. If your entire fueling plan depends on sweet foods, your calorie intake drops -- and that drop compounds over time.
Your gut slows down. As exercise duration increases and blood flow stays directed to your muscles, your digestive system becomes less efficient. Highly concentrated simple sugars can sit in your stomach and cause nausea, bloating, and cramping. Solid food, eaten in small amounts, can actually be easier to tolerate because it releases energy more gradually.
Your body needs more than carbs. Beyond 6 hours, a small amount of protein -- roughly 5 to 10 grams per hour -- helps reduce muscle breakdown and keeps you feeling satisfied. Fat provides sustained energy. Neither shows up in a gel packet.
Data from race nutrition studies and elite performance coaches suggests that successful 100-mile finishers tend to consume over 250 calories per hour, while DNFs often average under 200. The difference frequently comes down to variety -- having enough food options that you can keep eating even when your preferences shift mid-race.
If you have not already dialed in your calorie targets, start with our ultra fueling calculator and framework. This post picks up where that one leaves off: you know how much to eat, now here is what to eat.
The Real Food Lineup: What Actually Works¶
Not every "real food" works during an ultra. You need foods that are calorie-dense, easy to chew while moving, low in fiber, and unlikely to cause GI distress. Here are the foods that show up again and again in the drop bags and crew boxes of experienced ultra runners.
Savory Foods (The Stars of Late-Race Fueling)¶
Boiled potatoes with salt. The single most popular real food in ultrarunning. Bite-sized chunks of boiled potato dusted with salt deliver fast carbs and sodium with almost zero fiber. Easy to digest, easy to eat with one hand, and they taste good after 15 hours when nothing else does. Prep tip: boil them soft, cut into cubes, toss in salt, and store in a zip-lock bag.
PB&J sandwiches (cut into quarters). A staple at American ultras for good reason. Each quarter gives you roughly 100 calories with a mix of carbs, fat, and protein. Use white bread -- this is not the time for whole grain. Cut them small enough to eat in two bites without choking while breathing hard.
Cheese quesadillas. Common at aid stations in western US ultras. A flour tortilla with melted cheese gives you 200+ calories, some protein, and enough fat to keep you satisfied. They travel well in drop bags wrapped in foil.
Bean and cheese burritos. Higher calorie density than quesadillas, with added protein from beans. Best eaten at a longer aid station stop where you can sit for 2 to 3 minutes. Not ideal for eating on the move.
Broth and ramen. When your stomach says no to everything solid, warm salty broth is often the reset button. Cup noodles or ramen at an aid station can provide 400+ mg of sodium plus easy carbs. Many runners credit a cup of broth at mile 60 with saving their race.
Sweet-Adjacent Foods (The Bridge Between Gels and Savory)¶
Medjool dates. Two dates deliver about 130 calories and 35 grams of carbohydrates -- slightly more than most gels. They are sweet, but the natural sugars digest differently than maltodextrin for many runners. Research has shown dates to be as effective as commercial sports products for fueling endurance exercise. Easy to carry and no wrapper to fumble with.
Bananas. Available at nearly every aid station. About 100 calories each, with potassium. The downside: they get mushy in drop bags and are hard to eat while running hard. Best grabbed fresh at an aid station.
Orange slices. The burst of citrus can cut through sweet fatigue in a way that surprises people. Low calorie density means they are more of a palate cleanser than a primary fuel source, but that palate reset can help you eat more of other foods.
Calorie-Dense Carry Foods (For Between Aid Stations)¶
Rice balls (onigiri). Popular with ultra runners who have spent time racing in Japan or who follow Japanese ultra culture. White rice packed into a ball with a pinch of salt delivers clean carbs that are easy on the stomach. Add a small piece of pickled plum or a strip of nori for sodium and flavor. Each ball is roughly 150 to 200 calories.
Mini wraps with nut butter. Spread peanut or almond butter on a small flour tortilla, roll it tight, and cut into pinwheels. Each piece is 80 to 120 calories. The fat and protein from nut butter gives you sustained energy between aid stations. Wraps hold up better than bread in a pack.
Pretzels. Simple, salty, and almost impossible to mess up. Low fiber, decent carbs, and they do not melt, leak, or go bad. Not calorie-dense enough to be a primary fuel, but excellent as a constant snack between bigger eating opportunities.
When to Eat What: A Race-Day Food Timeline¶
The transition from gels to real food is not a switch you flip. It is a gradual shift based on duration, effort, and what your body tells you. Here is a general framework for a 100-mile race:
Miles 0 to 20: Stick with what works.
You are running at your highest relative intensity. Your digestive system is under the most stress from effort. Gels, chews, and sports drink are fine here. This is not the time to experiment with a burrito.
Miles 20 to 40: Start mixing in solids.
As your pace settles and your effort drops, your gut can handle more. Start alternating between gels and small solid foods -- a few potato cubes, a quarter of a PB&J, a handful of pretzels. Keep portions small. You are training your stomach to accept real food at effort, not asking it to digest a meal.
Miles 40 to 70: Real food takes over.
This is where sweet fatigue hits hardest. Most experienced runners shift to primarily savory foods here. Potatoes, quesadillas, broth, rice balls. Keep gels in reserve for moments when you need fast energy (a big climb, a rough patch), but let real food do the heavy lifting on calories.
Miles 70 to 100: Whatever you can get down.
The final 30 miles of a 100 is survival eating. Your palate, energy, and motivation are all unpredictable. Have maximum variety available. Broth, flat cola, potatoes, dates, a wrap -- anything that delivers calories. This is where having a crew who knows your preferences matters enormously. If you do not have crew, your drop bags need to contain options, not a single predetermined food.
Mountain ultras: eat on the climbs. If your race has significant elevation gain, the uphills are your best fueling windows. When you shift from running to power-hiking a long climb, your heart rate drops and blood flow returns to your gut. That is the time to eat real food -- unwrap a rice ball, chew some potato cubes, take a few bites of a wrap. Do not wait until the aid station at the top. Eat while you climb, digest on the downhill.
For crew and drop bag strategy, see our guide to crewing and pacing an ultra.
Setting Up Your Food System¶
Having the right food means nothing if you cannot access it when you need it. Here is how to organize real food across your race infrastructure.
What to Carry On You¶
Your pack or vest should hold 2 to 3 hours of fuel between aid stations. Focus on foods that:
- Do not need refrigeration
- Will not leak or crumble in a bouncing pack
- Can be eaten with one hand while walking
- Are individually portioned (no fumbling with containers)
Good carry options: dates, pretzels, mini wraps, rice balls wrapped in foil, small zip-lock bags of potato cubes.
What to Put in Drop Bags¶
Drop bags let you pre-stage food at specific aid stations along the course. Pack more than you think you need -- your preferences will change mid-race in ways you cannot predict.
Include a mix of savory and sweet. Label bags by aid station name, not mile number (easier to read when tired). Include a note to yourself about what to grab first -- "Start with broth, then potatoes" -- because decision-making degrades late in a race.
Think about temperature. A quesadilla sitting in a drop bag at a summer desert race for 12 hours is different from the same quesadilla at a cool mountain aid station at 2am. Stick to shelf-stable items (wraps, dates, pretzels, rice balls) for drop bags at hot-weather races. Save perishable items for crew handoffs where you control the timing.
What to Rely on at Aid Stations¶
Most well-organized ultras stock potatoes, PB&J, broth, bananas, oranges, chips, and cola at aid stations. But do not assume. Check the race website for the aid station menu and plan around what will be available versus what you need to bring yourself.
A rule of thumb: use aid stations for hot food (broth, ramen, quesadillas) and fresh items (bananas, oranges). Carry shelf-stable foods (dates, wraps, pretzels) for the gaps between.
Common Mistakes With Real Food Fueling¶
Trying new foods on race day. Every food on your race-day list should have been tested during at least two long training runs at race effort. Your gut during a 4-hour Saturday long run is the closest simulation you will get. If you have not done gut training yet, read our 12-week gut training protocol before building your food list.
Eating too much at once. Real food is more satiating than gels. That is usually a good thing, but it also means your brain will tell you to stop eating sooner. Stick to your calorie targets even when you feel full. Small, frequent bites beat big meals.
Ignoring the calorie math. Real food feels wholesome, but you still need to hit 200 to 300+ calories per hour. A few potato cubes and an orange slice will not cut it. Know the calorie count of every food in your plan and do the math before race day.
Going all-or-nothing. The best ultra fueling plans use a hybrid approach. Gels for the early miles and quick energy hits. Real food for sustained fueling in the middle and late race. Do not abandon gels entirely -- keep them as a backup tool even if real food is your primary strategy.
Forgetting sodium. Real food often has less sodium than commercial sports nutrition. If you are switching from gels to real food, make sure you are supplementing sodium separately through electrolyte capsules, salted foods, or broth. Hyponatremia and cramping do not care whether your calories came from a gel or a potato.
For a deeper dive on hydration and electrolyte strategy, see our ultra hydration and electrolytes guide.
Frequently Asked Questions¶
Q: Can I run a 50-miler on real food only, no gels at all?¶
Yes, many runners do. A 50-miler typically takes 8 to 14 hours, which is long enough that real food becomes practical but short enough that you can fuel adequately with solid food throughout. The key is testing your foods during training runs of 3 to 5 hours at race effort. If your stomach handles it in training, it will likely hold up on race day.
Q: What if I have dietary restrictions?¶
Most real food options are naturally flexible. Potatoes, rice, bananas, and dates are gluten-free and vegan. For nut allergies, swap PB&J for sunflower seed butter or avocado wraps. The important thing is hitting your calorie and sodium targets -- the specific foods are adaptable.
Q: How do I keep food fresh in drop bags for 12+ hours?¶
Shelf-stable foods (dates, pretzels, rice balls, wraps with nut butter) do fine at ambient temperature. For items like quesadillas or burritos, wrap tightly in foil -- they do not need to be hot to be effective. Avoid anything that spoils without refrigeration (dairy-heavy items, fresh meat).
Q: Should I eat differently for a mountain ultra versus a flat 100?¶
Yes. Mountain ultras involve more hiking, which means lower intensity and more opportunity to eat larger portions. Many runners eat at the top of climbs, not during them. Flat ultras maintain higher sustained effort, which keeps your gut under more stress -- lean toward easier-to-digest foods (potatoes, broth, dates) over heavier options (burritos, quesadillas).
Q: How do I know when to switch from gels to real food during a race?¶
Listen to two signals. First, flavor aversion -- if you start dreading your next gel, your body is telling you something. Second, elapsed time -- most runners hit sweet fatigue between 5 and 8 hours regardless of distance. Start testing solid foods during training runs that last 4+ hours so you know your personal tipping point.
Q: What about caffeine from real food sources?¶
Flat cola is the most popular real-food caffeine source in ultras. A cup of coffee at a late-race aid station works too. Dark chocolate provides a small caffeine hit with calories and fat. Time your caffeine strategically -- most runners save it for nighttime sections or the final push, not the opening miles.
Key Takeaways¶
- Sweet fatigue is inevitable in races over 6 hours. Plan for it with savory options.
- Boiled potatoes, PB&J, dates, rice balls, and broth are the most reliable real foods across thousands of ultra finishes.
- Transition gradually from gels to real food between miles 20 and 40, not all at once.
- Test every food during training. No exceptions.
- Use a hybrid approach: gels for fast energy, real food for sustained fueling.
- Set up your drop bags and crew with maximum variety -- your preferences will change mid-race.
Start Running Smarter¶
Training for an ultra means tracking more than just miles. Your long runs, back-to-backs, and effort patterns all shape how your body handles nutrition on race day.
NavRun's AI training plans build your weekly schedule around your actual Strava data -- including the long runs where you should be practicing your real food strategy. Connect your Strava account and get a plan that accounts for how you actually train, not how a generic spreadsheet thinks you should.
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