800 Calories in a Bike Bottle
Endurance fuel for ultras, bikepacking, and adventure races. Real food you can drink — just mix and go.
Find Your FlavorYou've trained for months. Your nutrition shouldn't be the weak link.
Gels are dead weight
800 calories in gels = 8 GU packets, half a pound of sticky wrappers. That's bulk, trash, and constant fumbling.
"Was I supposed to chew that?"
Try chewing a bar while redlining on a climb. Your jaw is tired, your stomach says no, and you're losing time.
Chews? Do the math.
800 calories in energy chews = 9 packets, 1.2 lbs of gummies. 4 Hour Fuel is 200g of powder mixed into water you're already carrying.
The simple fix
800 calories in a single bottle
4 Hour Fuel is a powdered endurance superfood — real food ingredients you can drink. Mix in seconds. No wrappers, no chewing, no GI drama. Just efficient calories that keep you moving for hours.
Pick Your Flavor
Four flavors, one mission — keep you fueled without slowing you down.
What Athletes Say
Used by expedition racers, ultrarunners, and bikepackers worldwide.
"It will always go down, and STAY down"
"Between expedition races and endurance MTB races, I keep a steady supply of 4HF on hand. Sometimes I’m yearning for something savory, sometimes I’m yearning for something sweet (I’m looking at you, Banana Chocolate!) - but it will always go down, and STAY down. Cheers to many many more miles of fun, fueled with 4HF!! "
"4Hour Fuel has been a game changer in the landscape of endurance fuels for me."
"4Hour Fuel has been a game changer in the landscape of endurance fuels for me. Instead of thinking about how many gels, salt, and fluids I'm getting in every hour this simplifies so much about my nutrition. I have one bottle that lasts me 2-4 hours depending on intensity levels, and that's all I need. I supplement with solid food as needed and don't need to think about my nutrition plan. It's so easy, and it tastes great for multiple days. "
"Essentially, I use 4 hour fuel as a “ stabilizer” that buffers those spikes and dips, sipping small amount every 15-20 minutes, and eating small solids when needed. "
" A majority of “ race food” is calorie dense and designed to be ingested quickly and forgotten. This strategy doesn’t work well for me personally, I get huge spikes and dips, as my systems incorrectly responds to the signals it’s receiving. Essentially, I use 4 hour fuel as a “ stabilizer” that buffers those spikes and dips, sipping small amount every 15-20 minutes, and eating small solids when needed. I’ll admit that the addition of the constant monitor (Libre) I started wearing, and the app it reads into, was extremely beneficial in getting things dialed in. After weeding through the bars, balls, gels, and such, I came up with solids that worked well in conjunction with 4hf, and stuck to the plan….as much as any plan is stuck to during an AR."
"90% of our calories. We never got sick of it."
"24-hour races are all about efficiency if you want to be competitive. In the 2021 USARA nationals, we used 4-hour fuel as 90% of our calories. We never got sick of it and felt powerful on every stage. My team's race plan now includes 4-hour Fuel!"
Lebn Lovejoy
USARA Nationals 5th place - Team BlueJay
"The best supplemental calories in a mixable form I have ever found"
"My name is Mateo and I am an ultra endurance bike pack racer based in Bend, Oregon. I have been using your product now for a few months and cannot praise it enough. With the rigors of training, travel and racing, your product is honestly the best supplemental calories in a mixable form that I have ever found."
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Simple Ingredients
No artificial flavors, colors, or preservatives. Just what your body needs.
Proven Performance
Tested by endurance athletes in ultras, Ironmans, and multi-day events.
Stomach Friendly
Designed to be easy on your gut when the miles pile up.