How much food do I actually need to carry for a century ride?

Enough for the stretches between resupply points, plus a margin — planning to buy food along the way works until the shop is shut or the ride runs long. Carrying slightly more than your calculated need is cheap insurance on an unsupported route.

Should I eat solid food or just drink my calories on a long ride?

Most riders do better with a mix. Drink mix is easy to consume constantly, but relying on it alone for six-plus hours can get hard to stomach — solid food and gels break up the monotony and are often easier to tolerate in the second half of a long day.

How do I know if my long-ride fueling plan actually works?

Test it on a long training ride first, at the intensity and duration close to what you expect on the day. If it sits fine there, it's more likely to sit fine when it counts.

Long-Ride Fueling: 3+ Hour Rides

Past three hours, fueling stops being just a number and starts being a logistics problem — what you can actually carry, buy, and stomach for that long. Getting the target right (see carbs per hour cycling) is only half of it.

Plan the carbs first, then the logistics

Start from your target range — commonly 60–90 g/hour for a long or hard ride — then work out how you'll actually deliver that hour after hour. A single format (all gels, or all drink mix) gets harder to stomach the longer the day gets, so most riders lean on a mix.

What to carry

Drink mix for a steady baseline — easy to consume without thinking about it.
Gels for concentrated, quick carbohydrate before a climb or a harder section.
Real food — bananas, rice cakes, sandwiches — for variety and something that isn't sweet.
A backup beyond your calculated need, especially on unsupported routes where the next shop isn't guaranteed to be open.

Pacing your intake

Fueling on a schedule — say, every 20–30 minutes — beats waiting until you feel like you need it, since by the time hunger or flagging energy shows up, you're already behind. This matters more the longer the ride, since a small early deficit compounds over six or eight hours.

Resupply and self-sufficiency

On rides with shops, cafés, or aid stations along the route, you can plan to top up rather than carry everything. On remote gravel or rural routes, treat resupply as a bonus, not the plan — carry enough to finish even if a stop is closed or skipped.

Heat, sweat, and fluids on long days

Long rides in the heat raise your fluid and sodium needs alongside your carbohydrate target — the two aren't the same problem, and a drink strong enough to hit your carb number isn't necessarily right for your fluid needs too. Plan them somewhat separately, especially on hot days.

Test it before it matters

Whatever plan you land on, run it on a long training ride first. A gut that's never handled 80 g/hour for five hours shouldn't find that out for the first time on event day.

Common mistakes

Under-planning for an unsupported route. A closed shop shouldn't be the reason you bonk.
Relying on one product for the whole day. Variety helps both your stomach and your motivation to keep eating.
Not accounting for heat separately from carbs. Both matter, and they're not solved by the same bottle.

Long-ride fueling: eating well past three hours on the bike