Gravel Fueling Guide for Canadian Riders: Fuel That Holds Up When the Road Doesn't

It is hour four of a Saturday gravel ride and the route throws a climb you did not see on the map. The pavement advice you half-remember, eat early, drink to thirst, was written for a road ride with a feed zone and a predictable surface. Out here you missed the bottle handoff that was never going to exist, you are rationing what is left, and the next resupply is a general store you are not sure is open. The legs are fine. The fuel plan is the thing that fell apart.

Gravel breaks the usual fuelling advice in specific, predictable ways, and once you understand why, the fix is straightforward. This is a practical gravel fuelling guide for Canadian riders: how much carbohydrate to target, what to put in your bottles, when solid food earns its place, and what actually works from a convenience store stop at kilometre ninety. None of it is complicated. It just has to account for the fact that gravel is its own discipline, not a rough road ride.

What makes gravel different, fuelling-wise

Three things separate gravel from road fuelling. The first is that it is self-supported. There is no team car, often no feed zone, and frequently long stretches between any resupply. Whatever you do not carry or cannot buy mid-route, you do without. That alone changes the math, because your plan has to survive being wrong.

The second is mixed intensity. Gravel is rarely a steady effort. You spike hard up loose climbs, soft-pedal technical descents, and grind into headwinds across exposed sections. Those surges burn carbohydrate faster than an equivalent road pace, and the constant jostling on rough surface is harder on the stomach, which raises the risk of GI distress just when you need to eat (Pfeiffer et al., 2012). The third is simply duration: a gravel day is often longer than the road ride you would do with the same fitness, which pushes you deeper into glycogen territory and makes consistent fuelling non-negotiable.

Carbohydrate per hour for gravel

For most gravel efforts, target 60 to 90 grams of carbohydrate per hour. Sit at the lower end if you are newer to high-carbohydrate fuelling or have not trained your gut for it; move toward the upper end if you have built that tolerance and the day is long and hard (Jeukendrup, 2014; Podlogar & Wallis, 2022). The single biggest mistake on gravel is under-fuelling because the terrain made eating awkward, then trying to claw it back after the damage is done.

The 2:1 ratio matters more on gravel than almost anywhere, precisely because the durations are long. Glucose alone caps out around 60 grams an hour, and on a five or six-hour day that ceiling is the difference between holding form to the finish and limping the last hour. A 2:1 maltodextrin-to-fructose formula lets you absorb meaningfully more per hour without overloading the gut, which is the whole argument laid out in the 2:1 ratio breakdown. Start fuelling early, well before you feel you need it, as covered in when to start fuelling on a long ride.

Hydration on gravel

Gravel hydration is a logistics problem as much as a physiology one. Most riders run two bottles, and on a long, hot day that is not enough fluid between resupplies, so the strategy becomes deciding what each bottle is for. A common approach is one bottle of carbohydrate mix and one of plain water, so you can drink to thirst from the water without over-concentrating your fuel, and manage carbohydrate intake separately.

On longer or hotter days, some riders drop a bottle in favour of a concentrated flask of mix, taking small sips of high-carbohydrate fuel and drinking water alongside it. This keeps total fluid manageable while still hitting the carbohydrate number. Sodium losses climb in heat, so on a hot Ontario or interior-BC summer day, pay attention to electrolytes: 200mg of sodium per serving in your mix is a base, and you may want to add an electrolyte product for heavy sweat. A 250ml hydration flask is the practical tool for the concentrated-fuel approach.

What to put in your bottles

Here is the practical part. With Olway® Performance Drink Mix at 30 grams of carbohydrate per serving, dosing is simple arithmetic against your hourly target. In a 750ml bottle, two to three servings gives you 60 to 90 grams, roughly an hour of fuel in one bottle. In a larger 950ml bottle you can carry a bit more fluid with the same concentration, useful on hot days. A smaller 550ml bottle suits a more concentrated mix when you are pairing it with a separate water bottle.

Mixing double-strength, three servings in a 550ml bottle, is the move when you want to carry fuel and fluid separately: the concentrated bottle is your carbohydrate source, the second bottle is water. Because the Olway® mix is unflavoured, doubling the concentration does not turn it into syrup the way a heavily flavoured mix would, which is one of the quiet advantages of a neutral formula on a long day. Take small, regular pulls rather than large infrequent ones; the gut handles a steady trickle far better than a flood, especially on rough ground.

Mid-ride solid food

Liquid carbohydrate should be your foundation on gravel because it is easy to absorb and you can control the dose precisely. But on very long days, palate fatigue and the simple desire to chew something make solid food worth including. The key is timing it to the easier sections. Eat real food, a bar, a sandwich, a banana, when the terrain is smooth and the effort is low, so your gut has the blood flow to process it. Trying to eat solids mid-surge on a rough descent is how you end up nauseous.

Keep solids simple and carbohydrate-led, and do not let them replace your liquid fuelling, supplement it. The mistake is switching entirely to solids late in a ride, when your stomach is least able to handle the volume. A steady stream of drink-mix carbohydrate with occasional solid food on the smooth sections is the combination that holds up.

Convenience store fuelling

This is the section nobody writes, and it is half of what makes gravel work in Canada. When the route passes a Tim Hortons, a gas station, or a small-town general store, you fuel from what is actually on the shelf. The good news is that the best convenience-store options are simple and cheap. A bottle of regular cola, flat or fresh, is fast carbohydrate and a little caffeine. A banana, a handful of gummy candy, a small bag of pretzels for salt and a change of texture. Plain pastries or a small bag of chips can work when you are sick of sweet.

The thing to avoid is overeating at the stop because you are hungry, then climbing straight back onto a hard effort with a full, sloshing stomach. Take on fast carbohydrate, top up your bottles, and pocket a little for the next stretch. If you carry a small supply of your own mix in a sandwich bag, you can refill a bottle with proper fuel and use the store for fluid and variety. The store is a resource, not a substitute for a plan.

Race-day versus training fuelling

Whatever strategy you intend to use on event day, you have to practise it in training first. This is the oldest rule in endurance nutrition and the most ignored: never try anything new on race day. The gut adapts to higher carbohydrate intake over weeks, not overnight, so the 90-grams-an-hour plan that works for a trained rider will make an unpractised one ill (Podlogar & Wallis, 2022). Build the habit on your regular long rides.

Practising also tells you the practical things no guide can: how many bottles you actually go through, which solid foods sit well for you, how your stomach handles the rough sections, where on the route you tend to forget to eat. Train the plan and event day becomes a rehearsal of something familiar rather than an experiment you are running on the most important ride of the season.

Frequently asked questions

How many carbohydrates per hour for a four-hour gravel ride?
Target 60 to 90 grams per hour. Lean toward 60 if you are newer to high-carbohydrate fuelling, toward 90 if you have trained your gut and the effort is hard. Over four hours that is roughly 240 to 360 grams total, which a 2:1 drink mix can deliver across your bottles.

What should I drink during a gravel race?
A carbohydrate drink mix as your fuel base, ideally a 2:1 maltodextrin-to-fructose formula, alongside water for free hydration. Add an electrolyte source in heat. Running one bottle of concentrated mix and one of water lets you manage fuel and fluid independently.

Can I just use food instead of drink mix on gravel?
You can, but it is harder to absorb a precise carbohydrate dose from solids, and rough terrain makes eating solids tricky. Most riders do best with liquid carbohydrate as the foundation and solid food as a supplement on smooth, easy sections.

How do I avoid GI distress on rough gravel?
Take small, regular sips rather than large infrequent ones, keep your mix at a sensible concentration, time solid food to easy terrain, and train your gut to the intake you plan to use. Most GI problems come from an unpractised intake combined with the jostling of rough ground (Pfeiffer et al., 2012).

Fuel for the riding you are actually doing

Gravel rewards riders who plan for the discipline in front of them rather than borrowing a road playbook. Carry more than you think you need, fuel early and steadily, run a 2:1 mix so the long hours do not outrun your absorption, and treat the convenience store as the tool it is. The legs are usually willing on a gravel day. It is the fuelling that decides whether they get to prove it.

For more on the carbohydrate math behind these numbers, see 120g of carbohydrates per hour, and you can find Olway® at a retailer near you on the stockists page.

References

Jeukendrup AE. A step towards personalized sports nutrition: carbohydrate intake during exercise. Sports Medicine. 2014;44(Suppl 1):S25–S33. doi:10.1007/s40279-014-0148-z
Podlogar T, Wallis GA. New Horizons in Carbohydrate Research and Application for Endurance Athletes. Sports Medicine. 2022;52(Suppl 1):5–23. doi:10.1007/s40279-022-01757-1
Pfeiffer B, Stellingwerff T, Hodgson AB, et al. Nutritional intake and gastrointestinal problems during competitive endurance events. Medicine & Science in Sports & Exercise. 2012;44(2):344–351. doi:10.1249/MSS.0b013e31822dc809