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  4. Fueling The Black Canyon 50k With Ryan Sullivan
Mar 5, 2026

Fueling The Black Canyon 50k With Ryan Sullivan

By The Feed.

The Black Canyon 50K is one of the fastest 50Ks in the country — and this year's field made sure of it. Here's how I fueled a sub-6-minute-pace desert run, and the $2 gel I can't stop reaching for.

In February, I ran the Black Canyon 50K on a notoriously fast year in a deeply competitive field. It was a blast. The lead pack took the first mile out in 5:18, and we ran some stunning desert trails on a net-downhill course averaging well under 6-minute pace for the first 20 miles. I ended up in 5th, about a minute over Jesh Small's CR from last year.

Since I'm writing this for The Feed, this is where I get to a product I've been loving lately and that I used in the race. They might not be happy with me promoting their cheapest item, but I'm in love with CARBS Fuel gels right now. I mean, $2.00–$2.50 for 50 g of carbohydrates plus/minus sodium and caffeine?

What I Like

  • 50 grams of carbs per gel — simplifies the fueling equation (I aim for 100–120 g per hour in higher intensity races like this one)

  • Versatile formulas — a version with sodium (450 mg) and a version with caffeine (100 mg)

  • Cost-effective — $2.00 for plain gels, $2.50 for sodium or caffeine versions

  • Taste — totally subjective, but they're unflavored; I love the salted ones

What Some May Not Like

  • 2:1 glucose: fructose ratio — once pushing 90+ grams/hour, a lot of people prefer a 1:0.8 ratio for absorption and avoiding GI issues. This hasn't impacted me personally from a symptomatic perspective (maybe I have privilege or weird gut transporters).

  • Unflavored — not for everyone

  • Slightly bigger than other gels — but that's because they have more carbs

What I Took for 3.5 Hours at Black Canyon

  • 1 CARBS gel with sodium and 1 CARBS gel with caffeine, alternating every 30 min

  • Skratch Hydration Mix (20 g carbs and 380 mg sodium) per 500 mL bottle, 4 total bottles

Totals: 120 g/hour carbohydrates · ~1,000 mg/hour sodium · 2L of fluid

Should You Try Them?

If you haven't tried them, it's worth ordering a few and testing them out. Even if you don't plan on racing with them, the small price tag makes them a cost-effective tool in training. But you might find yourself wanting to just use them all the time like me.

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