Calgary Marathon 2027 fueling guide: aid stations, XACT fruit bars, altitude, and a plan for every pace

The Beneva Calgary Marathon starts at 6:45 AM on Sunday, May 30, 2027, and at the last edition the 42.2 km course had 14 aid station stops, about every 2 to 4 km (1.2 to 2.4 miles). Every stop had water and XACT Electrolytes. Some also had XACT Energy Fruit Bars, with 25 g of carbohydrate each. There are no gels on course, and the electrolyte drink has almost no carbohydrate. So most of your fuel has to come with you. This guide sets out what the organizer has published, when you will reach each station at your pace, and three plans to choose from.

Calgary has two quirks that matter for fueling. The city sits at about 1,040 m (3,500 ft), and late-May air on the Prairies is cool and dry, so you lose sweat without feeling wet. And the race starts early: breakfast is a 4:00 AM job. The race has a new title sponsor, Beneva, replacing Servus. The 2027 start line and aid station map are not out yet, so the station list below is based on the last edition’s official interactive map. Recheck it in race week.

Calgary Marathon 2027: the confirmed race facts

The 6:30 limit works out to about 9:15 per km (14:53 per mile) from the moment you cross the start line. There are no published split cut-offs. Instead, sweep cyclists ride at the cut-off pace. Once they pass you, you move to the sidewalk, aid stations may no longer be fully stocked, and you must be able to finish unsupported. For a slow runner, that is one more reason to carry your own fuel.

What is on the Calgary Marathon course

This is the full list from the last edition’s official interactive course map. The map does not print a kilometre for each station, so the distances below are measured along the mapped route and rounded; treat them as close, not exact. The course is an out-and-back to Bowness, so stations 5 to 8 are used twice. Stations 9 and 10 on Memorial Drive are used only on the way home.

One catch: the official station list and the official map do not agree. The race-day page and race guide say 4 of the 14 marathon stations have fruit bars. The interactive map marks fruit bars at stations 2, 3, 5, 7 and 10, which works out to 7 of the 14 stops. Plan for the smaller number and treat any extra bar as a bonus. Either way, the longest stretch without a fruit bar on the map runs from 21.4 km to 29.9 km, around the Bowness turnaround: 8.5 km (5.3 miles) with water and electrolytes only.

Now the numbers. XACT lists each 30 g fruit bar at 25 g of carbohydrate, about the same as a typical gel. The organizer says the bars are soft and dissolve fast, but it is still a chew, not a squeeze. XACT’s electrolyte tablet has 1 g of carbohydrate and 500 mg of sodium in 500 ml of water. If the course drink is mixed the same way, a 150 ml cup gives about 150 mg of sodium and almost no carbohydrate. Count the cups for salt and fluid, not for energy.

When you will reach each station at your pace

The table shows elapsed time from your own start at an even pace. A 3:00 runner reaches the first fruit bar at 0:26 and the last one at 2:47. A 5:00 runner reaches the Bowness turnaround stations at about 3:00 and the last fruit bar at 4:38. If that runner crossed the line at 7:00 AM, that is about 11:40 AM, when the day is warming up.

Pick your plan: three runner profiles

World Athletics’ consensus statement gives 30 to 60 g of carbohydrate per hour as the usual marathon range, and its companion paper on distance runners suggests trained runners try up to 90 g per hour in events longer than about two and a half hours. Research on multiple transportable carbohydrates shows that intakes above 60 g per hour are only absorbed well when the product mixes glucose and fructose and the gut has been trained for it. So here are three honest profiles. With 25 g gels, one every 30 minutes gives 50 g per hour, every 25 minutes gives 60 g, and every 20 minutes gives 75 g. A 25 g XACT fruit bar counts the same as one of those gels.

Racing it: your problem is volume, and the course gives you almost none of it. At 75 g per hour from gels alone, a 3:00 race needs nine 25 g gels. Chewing a bar at 4:15 per km is hard, and electrolyte cups add salt, not carbohydrate. So carry all of it, in shorts pockets, a belt or a soft flask, all of which the organizer allows. Build your number over eight to ten weeks of long runs, starting at 60 g and adding 10 to 15 g every second week while your stomach stays quiet. Take the first gel at about 20 minutes, near the 6.0 km station, and the last one near 36 km.

Steady marathon: think in grams. A 4:00 race at 60 g per hour is 240 g. If you take a fruit bar at four stations, that covers 100 g, which leaves about six carried 25 g gels. If you prefer not to chew, carry ten. Put at least two of your carried gels between 21.4 and 29.9 km, the turnaround stretch where the map shows no bars. Write the grams next to each item and total each hour.

Long day: five to six and a half hours on your feet changes the math. Fifty grams per hour over six hours is 300 g. Even if you eat a bar at all seven stops the map marks, that is 175 g, and if only four stations have them it is 100 g. So carry at least five gels as a base and use the bars on top. Small, frequent doses work best: half a bar or half a gel every 15 minutes is easier on the stomach than a full one every 30. Stay ahead of the sweep cyclists. Past them, the stations may not be fully stocked, and your own fuel is all you have.

Caffeine, sodium, and the black currant bar

• Caffeine: the ISSN position stand supports 3 to 6 mg per kg taken about 60 minutes before exercise. For a 70 kg runner, 3 mg per kg is 210 mg. With a 6:45 start, that means around 5:45 AM, after you arrive at the start area.
• The Black Currant fruit bar on course contains caffeine, the organizer says. XACT lists its Blackcurrant Performance bar at 25 g of carbohydrate and 50 mg of caffeine from guarana, about half a cup of coffee. Check the wrapper to be sure it is the same bar. Two of them late in the race add 100 mg, a useful lift if you have tested it.
• If you already took a big caffeine dose before the start, pick another flavour at the table. Too much caffeine can upset your stomach.
• Sodium: if the course drink is mixed like XACT’s tablet, each 100 ml holds about 100 mg of sodium. Drinking a cup at most stations covers a lot of what most runners need on a cool day. Salty sweaters may still want a tested salt product, roughly 300 to 600 mg per hour in total.
• If the course drink tastes strong, alternate with water. Do not take electrolytes and a salt capsule on top of each other unless you have tested that combination.
• Tear the top of your gel before the station, so you can drink with the same hand.

Hydration for a cool, dry late-May morning in Calgary

The organizer gives a race-day average high of 21 °C (70 °F) and a low of 7 °C (45 °F). Long-term averages for the end of May in Calgary show a high near 18 °C (65 °F), a low near 7 °C (45 °F), about a 31 percent chance of a wet day, and almost no muggy days. Sunrise is around 5:27 AM. So most runners start in the cold, finish in mild air, and race in low humidity throughout. Dry air pulls sweat off your skin fast, so you may feel dry while still losing fluid. The other side matters just as much: World Athletics warns against drinking more than you sweat, and finishing heavier than you started is a sign of overdrinking.

• Altitude: at about 1,040 m, most runners from sea level will feel the first kilometres a little harder than the pace says. In a lab study, endurance athletes lost about 6 percent of their maximum aerobic capacity for every 1,000 m of altitude. Marathon pace is well below maximum, so the cost is smaller, but start a few seconds per km slower than you would at home.
• Calgary’s air is dry. Start drinking normally the day you land, not on race morning only, and arrive at the start with pale-yellow urine.
• The organizer’s nutrition tips suggest drinking half a litre to a full litre (two to four cups) of fluid in the four hours before a workout. Spread it out and stop most drinking 30 to 45 minutes before the start, so you are not stuck in a porta-potty line.
• Test your sweat rate in one cold and one mild long run in April and May.
• Seek help at an aid station or from a course marshal for confusion, severe headache, repeated vomiting, or collapse, whatever the clock says. First aid on course is provided by the Canadian Ski Patrol, with a first aid tent at the finish.

Breakfast and the pre-race top-up for a 6:45 start

A familiar carbohydrate-rich meal one to four hours before racing is the standard framework, and ACSM gives 1 to 4 g of carbohydrate per kg in that window. With a 6:45 start, that window opens in the middle of the night. The organizer recommends arriving 75 minutes before your start and being in your corral at least 20 minutes before release. Road closures begin at 4:45 AM, and parking at Stampede Park is very limited, so the organizer suggests taking the C-Train to Victoria Park station. Work backward from those times.

• 3:45 to 4:15 AM, about 2.5 to 3 hours before: the main breakfast, a practised meal such as a bagel with jam, a banana and juice, or white rice with honey, about 1.5 to 2.5 g of carbohydrate per kg. Keep fat and fibre low.
• If you cannot face food that early: sleep longer and eat a smaller meal of about 1 g per kg at 5:00 AM, then add a gel near the start.
• 4:30 to 5:00 AM: leave for Stampede Park. Sip water or a familiar sports drink on the way.
• About 5:30 AM: arrive. Bag check opens at 5:45 AM.
• Around 5:45 AM: caffeine, at the dose and timing you have practised.
• 6:20 to 6:40 AM: in your corral, with an optional gel 10 to 15 minutes before you cross the line, only if used in training.
• Bring a throwaway layer. Clothes left at the start are collected and donated to charity.

Course tactics: where Calgary tempts you

The organizer says all routes may change for 2027, and the start line is still to be announced. These notes follow the last edition’s course. Its elevation profile, from the official interactive map, climbs gently from about 1,040 m downtown to about 1,070 m near the Bowness turnaround at roughly 25.5 km, then runs gently downhill back to the finish. There are kilometre markers every kilometre.

• 0 to 10 km: from Stampede Park through the east side of downtown, past the Centre Street Bridge, out to St. Georges Drive NE and back along 9 Avenue SE. Flat and fast, with a short rise near 8 km. Take your first gel around the 6.0 km station, even if it feels early in the cold.
• 10 to 19 km: west through 11 Avenue SW, then across to Memorial Drive along the Bow River and out on Bowness Road. The gradual climb starts here. Steady runners should have three gels or bars in by 19 km.
• 19 to 30 km: the out-and-back to Bowness. Fruit bars at 21.4 km, then water and electrolytes only at 24.8 and 26.5 km, with the turnaround in between, until bars again at 29.9 km. This is the highest and quietest part of the course, and where carried gels matter most.
• 30 to 37 km: back the same way, mostly gently downhill, with stations at 32.3 and 35.5 km. Downhill running feels easy, so this is where runners forget to eat. Stay on the clock.
• 37 to 42.2 km: Memorial Drive along the river, with water at 37.1 km and the last fruit bars at 39.1 km near the Centre Street Bridge, then back to Stampede Park and the finish in Enmax Park. Your last carbohydrate should be in by about 37 km.

The long-run rehearsal that makes the plan real

Calgary asks you to eat at 4:00 AM and race at 6:45 AM, so in April and May, schedule two or three long runs that start early. Eat breakfast at the same time as on race day, carry the same products, and fuel at the same clock times. If you plan to use the course fruit bars, buy some and practise chewing one at goal pace; the organizer says XACT sells them at its expo booth, and they are sold online too. One rehearsal proves the timing works; the next tests it under fatigue, at goal pace for racers and at the full expected time for the long-day group.

If you live near sea level, you cannot rehearse the altitude, but you can rehearse the restraint. Run the first 10 km of one long run 5 to 10 seconds per km slower than goal pace and see how much better the last third feels. The later rehearsals are where you simplify. If carrying eight gels is awkward, plan around four fruit bar stations and carry gels mainly for the 21.4 to 29.9 km gap. The best plan is the one you can still follow on Memorial Drive at 37 km.

Race-week Calgary checklist

• Recheck the official race-day page and interactive map for the 2027 start line, station positions and which stations have fruit bars.
• Pick up your package on Friday, May 28 (10:00 AM to 8:00 PM) or Saturday, May 29 (10:00 AM to 4:00 PM) at GMC Stadium. There is no race-day bib pick-up.
• Lay out every carried item, add one backup, and write grams and timing on one card. Mark the 21.4 to 29.9 km gap.
• Plan your morning backward from 6:45: breakfast, transit to Victoria Park station, arrival 75 minutes early, corral 20 minutes before release.
• Check the forecast 48 hours out and adjust layers, fluid and sodium, not the whole plan. Watch the organizer’s Event Alert System flags on race morning.
• Do not buy an unfamiliar gel at the expo because the flavour sounds good.

Frequently asked questions

Sources and update notes

1. 1Beneva 42.2 km MarathonBeneva Calgary Marathon (Run Calgary)Accessed October 25, 2026; May 30, 2027 date, 6:45 AM start, 7:05 AM start line close, start TBA, Enmax Park finish, 6:30 limit, 2026 map links
2. 2Race Day InformationBeneva Calgary Marathon (Run Calgary)Accessed October 25, 2026; 14 aid stations, XACT Electrolytes and fruit bars, sweep cyclists, corral and arrival advice, road closures, transit, bag check (marked subject to change for 2027)
3. 3Race Weekend ScheduleBeneva Calgary Marathon (Run Calgary)Accessed October 25, 2026; 2027 package pick-up times and race-day schedule
4. 4Frequently Asked QuestionsBeneva Calgary Marathon (Run Calgary)Accessed October 25, 2026; race-day weather averages, 1,040 m elevation, 115 m cumulative climb, hydration packs allowed, kilometre markers, first aid
5. 52026 Interactive Course MapRacePoint for the Calgary MarathonAccessed October 25, 2026; aid station locations and provisions, turnaround, elevation profile; station kilometres measured along the mapped route
6. 62026 Servus Calgary Marathon Race GuideCalgary Marathon (Run Calgary)Last edition’s aid station counts, fruit bar flavours, medical support, pace team, post-race food
7. 72026 42.2 km Course Map (PDF)Calgary Marathon (Run Calgary)Last edition’s route, kilometre markers and aid station legend
8. 8Nutrition Fueling Guide by Arielle FitzgeraldCalgary MarathonAccessed October 25, 2026; organizer replies confirming fruit bars are given instead of gels and are sold at the expo
9. 9Nutrition TipsCalgary MarathonHalf a litre to a litre of fluid in the four hours before training
10. 10Calgary Marathon Welcomes Beneva as Title SponsorCalgary Marathon via Cision (Newswire.ca), September 17, 2026New title sponsor and May 29 and 30, 2027 race weekend
11. 11XACT Energy BarsXACT NutritionAccessed October 25, 2026; 25 g carbohydrate per 30 g bar
12. 12XACT Electrolytes TabsXACT NutritionAccessed October 25, 2026; 1 g carbohydrate, 500 mg sodium per tablet in 500 ml
13. 13XACT Energy Performance BarsXACT NutritionAccessed October 25, 2026; Blackcurrant bar with 25 g carbohydrate and 50 mg caffeine from guarana
14. 14International Association of Athletics Federations Consensus Statement 2019: Nutrition for AthleticsInternational Journal of Sport Nutrition and Exercise Metabolism (Burke et al., 2019), PMID 30952204Carbohydrate ranges, pre-race meal, and hydration guidance
15. 15Contemporary Nutrition Strategies to Optimize Performance in Distance Runners and Race WalkersInternational Journal of Sport Nutrition and Exercise Metabolism (Burke et al., 2019), PMID 30747558Marathon carbohydrate intake, including up to 90 g per hour for trained runners in longer events
16. 16Nutrition and Athletic Performance: Joint Position StatementAmerican College of Sports Medicine (Thomas et al., 2016), PMID 268911661 to 4 g per kg carbohydrate 1 to 4 hours before exercise
17. 17A Step Towards Personalized Sports Nutrition: Carbohydrate Intake During ExerciseSports Medicine (Jeukendrup, 2014), PMID 24791914Multiple transportable carbohydrates and intakes above 60 g per hour
18. 18International Society of Sports Nutrition Position Stand: Caffeine and Exercise PerformanceJISSN (Guest et al., 2021), PMID 333880793 to 6 mg per kg, about 60 minutes before exercise
19. 19Linear Decrease in VO2max and Performance with Increasing Altitude in Endurance AthletesEuropean Journal of Applied Physiology (Wehrlin and Hallén, 2006), PMID 16311764About 6.3 percent lower VO2max per 1,000 m of altitude
20. 20May Weather in CalgaryWeather SparkEnd-of-May temperature, wet-day, humidity and sunrise averages