01·Course Characteristics
Glacial-fed waters, a relentless 1,050-meter climbing bike leg, and a scorching, exposed run define this mountain course. Success requires pacing the rollers and managing rapid thermal shifts from morning chill to midday sun.
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02·Course by Section
A single counter-clockwise rectangular loop starting at Coeur d'Alene City Beach. The glacial-fed water is highly transparent and typically cold, which can shock your breathing. Currents are minimal unless strong mountain winds pick up to create surface chop.
A highly honest single-loop course beginning with 30 km of scenic rollers on Lake Drive before shifting to US-95. The final 60 km demand constant power over sustained climbs, including the 2.4 km Cougar Gulch at 5.6%. Expect a mandatory safety no-passing and no-aerobar zone on a steep descent at the 80 km mark.
A fast but rolling two-loop paved course through downtown and along Coeur d'Alene Lake Drive. The lack of shade on Lake Drive, combined with heat radiating off the asphalt, makes this leg feel significantly hotter than the ambient temperature.
03·AVG beginners' Training Timeline
This 18-week progression systematically prepares you for the unique physiological trials of Coeur d'Alene. By addressing the 1,050-meter bike climb early through hill-strength intervals, and layering in heat-tolerance runs as you peak, you will arrive at Lake Coeur d'Alene fully resilient to both the elevation and the sun.
Aerobic Base & Altitude Prep
Build a solid aerobic base and initiate strength work to prepare for the 653-meter altitude.
Strength & Roller Endurance
Develop specific muscular endurance to tackle the 1,050 meters of rolling bike climbing.
Race-Specific Build & Heat Prep
Simulate back-to-back climbing efforts and transition directly into hot, unshaded brick runs.
Taper & Mental Readiness
Reduce volume to shed cumulative fatigue while maintaining short, high-intensity intervals to stay sharp.
Adapts to your fitness, schedule & recovery every week.
Personalize this timeline04·Race-Day Execution
Expect cool morning temperatures around 8-11°C warming rapidly to 28°C. Because the dry mountain air evaporates sweat instantly, you must proactively dump water and ice over your head at every mile's aid station to lower your core temperature.
Cold water can make digestion sluggish during the first 30-45 minutes of the bike, so start with warm-room gels or fluids. Target 60-90 grams of carbohydrates and consistent electrolytes per hour on the bike to offset the high altitude and masked dehydration.
Cap your effort on the first rolling 30 km of the bike to save energy for the heavy climbs on US-95. On the run, establish a conservative rhythm on the first loop, holding back to survive the scorching, unshaded stretch on Lake Coeur d'Alene Drive.
A full wetsuit, neoprene cap, and booties are highly recommended to combat the 15.5-20°C glacial water. Choose a versatile mid-depth wheelset to balance aerodynamics on the flats with control during high-speed, technical mountain descents.
The water temperature in Lake Coeur d'Alene typically ranges from 60°F to 68°F (15.5°C to 20°C), averaging around 64°F to 65°F. This makes wetsuits almost always legal for the race, and you may want to consider a neoprene swim cap and booties if the temperature trends toward the low 60s. Since the glacier-fed water is cold, be prepared for an initial shock when you enter the water at Coeur d'Alene City Beach.
The 56-mile bike course is highly demanding and honest, featuring approximately 3,445 feet of total climbing. While the first 18 to 19 miles along Coeur d'Alene Lake Drive consist of scenic, minor rollers, the remaining 37 miles on US-95 present a significant challenge with continuous long rollers and sustained climbs like the 1.5-mile Cougar Gulch climb at a 5.6% average grade. Be prepared for fast, steep descents and note that there is a strict, mandatory 'no-passing, no-aerobars' safety zone near the 50-mile mark.
The race takes place at a base altitude of approximately 2,141 feet (653 meters) above sea level. While the 1.2-mile swim is entirely flat, the 56-mile bike course features a challenging 3,445 feet of elevation gain. The 13.1-mile run course is rolling but relatively flat by comparison, with a total elevation gain of approximately 374 feet.
The most scenic and spectator-friendly spots to watch the action include Coeur d'Alene City Beach for the swim start and exit. For the bike segment, head to the intersection of Sherman Avenue and Lakeside to catch the athletes at the turnaround. Finally, McEuen Park and City Park are the best locations to cheer on runners during their loops and celebrate at the finish line.
Because the cold water swim and chilly morning air can make digestion sluggish, start the bike with easily digestible, warm-room fluids or gels. The demanding bike course requires high energy expenditure, so you should target 60 to 90 grams of carbohydrates per hour. Because the air in North Idaho is dry and sweat evaporates rapidly, consistently consume water and electrolytes, and use the aid stations on the exposed run course to dump ice down your kit to lower your core temperature.
Your Personalized Plan
FE26 builds your plan around your Strava data, your real schedule, and the exact demands of IRONMAN 70.3 Coeur d'Alene— then adapts every week to how you actually perform.
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