Races›Ultra 50K

Big A 50K Trail Race

Race-specific weather data and nutrition strategy for Big A 50K Trail Race in York, ME, US.

RunningUltra 50K (31.1 mi)Registration Open
LocationYork, ME, US
Date
May 2, 2026
Register on RunSignUpBuild Your Fueling PlanOfficial website
Race Location39.96°, -76.73°
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Race-Day Conditions

Moderate Heat Risk
Temperature
70°F

57–84°F range

Humidity
71%

44–89% range

5-year average via Open-Meteo. 80% of race days fall within the range shown. Updated Mar 30, 2026.

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Moderate heat risk

Temperatures may reach 84°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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High humidity conditions

Humidity averaging 71% combined with warm temperatures impairs sweat evaporation. Your body works harder to cool itself. Reduce intensity expectations and increase fluid intake.

Sample Ultra 50K Nutrition Plan

Based on a 155 lb runner finishing in ~6 hours. Your plan will differ based on body weight, experience, and conditions.

HourCarbsFluidSodiumExample
Hour 150g18oz400mg1 gel + sports drink
Hour 265g20oz500mg2 gels + water
Hour 365g20oz500mgChews + drink mix
Hour 460g20oz500mgGel + banana
Hour 555g18oz500mgPB sandwich + water
Hour 650g15oz400mgGel + sports drink
Total345g111oz2800mg

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

What to Expect at Big A 50K Trail Race

Big A 50K Trail Race is a Ultra 50K (31.1 mi) ultra 50k held in York, ME, US. Based on 5 years of historical weather data, athletes can expect median race-day temperatures around 70°F.

Temperatures at Big A 50K Trail Race typically range from 57°F to 84°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 89% 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 50K.
What is the typical race-day weather?
Based on 5 years of historical data, race-day temperatures at York, ME typically range from 57°F to 84°F (median 70°F). Humidity ranges from 44% to 89%.
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 York, ME 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 50K 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%