Races›Ultra 100 Mile

Silver Moon Race: Kings River

Race-specific weather data and nutrition strategy for Silver Moon Race: Kings River in Reedley, CA, US.

RunningUltra 100 MileRegistration Open
LocationReedley, CA, US
Date
April 4, 2026
Register on RunSignUpBuild Your Fueling PlanOfficial website
Race Location36.60°, -119.45°
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Race-Day Conditions

Live ForecastLow Heat Risk
Temperature
50°F

forecast

Humidity
55%

forecast

Live forecast via Open-Meteo. Updated daily. Historical avg: 58–82°F, 47–75% humidity.

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Moderate heat risk

Temperatures may reach 82°F. Plan for 10-15% higher sweat rates than cool conditions. Ensure adequate sodium intake (600-900 mg/hr) and consider pre-cooling strategies.

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Gut fatigue management

For races lasting 6+ hours, gut absorption efficiency decreases over time. Plan to reduce carb intake by 10-15% after hour 6 and shift toward easily digestible sources like gels and simple sugars.

Sample Ultra 100 Mile Nutrition Plan

Based on a 155 lb runner finishing in ~24 hours. Your plan will differ based on body weight, experience, and conditions.

HourCarbsFluidSodiumExample
Hours 1–6360g110oz3000mgGels, chews, drink mix
Hours 7–12300g106oz3000mgReal food rotation + gels
Hours 13–18240g92oz2400mgBroth, potatoes, cola, gels
Hours 19–24200g79oz2000mgWhatever works + caffeine
Total1100g387oz10400mg

These are general estimates. Get your personalized plan for this race →

What to Expect at Silver Moon Race: Kings River

Silver Moon Race: Kings River is a Ultra 100 Mile ultra 100 mile held in Reedley, CA, US. Based on 5 years of historical weather data, athletes can expect median race-day temperatures around 75°F.

Temperatures at Silver Moon Race: Kings River typically range from 58°F to 82°F. The upper end of that range crosses into moderate heat risk. While not extreme, sweat rates will be elevated and athletes who under-fuel on sodium or fluids may feel it in the later miles. A dialed-in hydration plan makes a real difference here. Humidity is also a factor here, with levels reaching 75% on warmer days. High humidity impairs sweat evaporation — your body's primary cooling mechanism — so perceived effort rises even when temperatures look manageable on paper.

Ultra-distance racing demands a flexible nutrition strategy. Gut absorption efficiency declines over many hours, so plan for variety — alternating between gels, chews, real food, and liquids helps prevent flavor fatigue and GI rebellion. Many ultra runners find that what works at hour 3 is intolerable by hour 10. Build your plan with options, not rigid prescriptions.

We do our best to keep race details accurate and up to date, but things can change and occasionally we simply get something wrong.

Always check the official website for the most complete and current information.

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Fueling and hydration suggestions are based on published sports science research including ACSM position stands, ISSN guidelines, and peer-reviewed work by Jeukendrup, Sawka, and others. This is not medical or dietary advice — individual needs vary. Always test your nutrition strategy in training before race day.

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Frequently Asked Questions

What should I eat during the race?
Your nutrition plan depends on your body weight, experience level, and race-day conditions. Use our free calculator to get a personalized, hour-by-hour fueling plan with specific carb, fluid, and sodium targets for this Ultra 100 Mile.
What is the typical race-day weather?
Based on 5 years of historical data, race-day temperatures at Reedley, CA typically range from 58°F to 82°F (median 75°F). Humidity ranges from 47% to 75%.
How much water should I drink?
Fluid needs vary based on your sweat rate, body weight, and race-day temperature. A typical range is 400-800 mL per hour, but hotter conditions at Reedley, CA may require more. Our calculator provides personalized fluid targets adjusted for the expected weather.
How many calories do I need?
Rather than replacing all calories burned, focus on carbohydrate intake — the primary fuel for endurance performance. Target 30-50% of caloric expenditure through carbs. Our calculator computes the exact hourly targets based on your Ultra 100 Mile pace and body weight.
When should I start fueling?
Begin fueling within the first 30-45 minutes. Start at about 70% of your target intake and ramp up to full by hour 2. This gives your gut time to adjust. Starting too late makes it nearly impossible to catch up on carbs and fluids.
Source: runsignup_apiView sourceVerified: Mar 30, 2026Confidence: 95%