IRONMAN · Klagenfurt · 13 Jun 2027
Training for IRONMAN Kaernten-Klagenfurt, Austria
Klagenfurt is sold on its hills. The organiser promises steep climbs and rewarding descents through Carinthia, riders believe the photograph, and a whole winter goes into becoming a climber. Then somebody measures the file. Of 180 km, 14.1 km point uphill. A Trained rider's plan spends 79 percent of the bike leg on flat road.
The hills are not imaginary. There are 17 climbs out there and 1512 m between them, and one of them tilts to 7.2 percent. What they are is 17 chances to spend money you will need later, on 42.3 km of flat marathon beside a lake, where the engine reads 57 percent of the run leg as one unbroken block.
By Kian Briel, founder. Analysed by engine 1, updated
What is actually on the road
The organiser's own course files, drawn the way the Event Analyzer draws a member's race.
- Swim3.82 km8 m upCourse file
- Bike180 km1,512 m upCourse file
- Run42.3 km101 m upCourse file
Swim first, 3.8 km of Lake Wörthersee, ending up the Lendkanal with spectators packed along both banks. The water read 21 C in 2026 and 22 C the year before. Transition is the University parking area opposite the Seepark Wörthersee Resort, so the bike starts where the canal delivers you.
Then the bike. The climbing arrives in 17 pieces and never in one. Steepest is 1079 m at 7.2 percent at kilometre 33. The two longest by time both tilt at 6.5 percent, one at kilometre 63.6 and one at kilometre 153.6, and neither reaches a quarter of an hour. In between, the road is fast and level: twenty short descents, none of which takes a Trained rider longer than about a minute, and one unbroken flat of 20.7 km from kilometre 78.
The run goes out through the Klagenfurt city centre and along the lake toward Krumpendorf, 42.3 km carrying 101 m. One rise interrupts it, 154 m at 3.2 percent just before kilometre 18. The engine reads the marathon as two flat slabs either side of that bump, 42 percent of the leg before and 57 percent after.
Course shape by distance
- Flat 88%
- Climbing 6%
- Descending 6%
The longest stretches
- Bike, climbing1.08 km2% of the bike
- Run, flat17.8 km42% of the run
- Run, flat24.3 km57% of the run
Each row is one unbroken stretch of the course that keeps the same shape the whole way. The number is how much of that leg you spend inside it, and it comes out the same whether you are fast or slow.
What this course asks of each leg
Twelve training dimensions scored for each leg against its own course, the way the Event Analyzer scores a member's race.
On every leg, aerobic endurance leads at 95. Behind it on the bike come aerobic durability at 93 and muscular endurance at 92, with fueling resilience at 85. Because the bike leg carries 53 percent of the day, the five highest entries in the cross-leg ranking are all bike entries. Strength and force reads 52 on the bike against 40 on the run, which is what 1512 m of short, steep ascent buys. It ranks twelfth.
In hours: a Trained rider swims 1:20:13, rides 6:34:31 at 159 W and runs 4:16:47, for 12:21:31. The Competitive band, from an input of 4.15 W/kg at 75 kg and 4:20 /km threshold pace, is home in 10:45:59. Their bike legs are 46 minutes apart. Their climbing plans are 18 minutes apart. The rest of that difference is made on flat road, by a rider doing nothing dramatic at all.
Heat is the hole in this reading, and you should fill it from the organiser rather than from the engine. Environmental resilience scores 20 on every leg, flagged low confidence, because it comes from the event type with no course evidence behind it. The record says more: a high of 30 C in 2025, 28 C in 2026, and 16 C in 2024. One of those three days was cold. Two were not.
- Aerobic endurance95
- Muscular endurance91
- Aerobic durability90
- Fueling resilience85
- Threshold durability80
- Technical skill66
- Threshold capacity55
- High-intensity capacity25
- Strength / force25
- Environmental resilience20
- Anaerobic capacity15
- Sprint power0
Nymiva reads what you can already show, from your own data
Connect your training history and the Focus Lab scores the same twelve dimensions this course demands against where you sit today. The gap between the two is what you train.
- MeasuredFrom your thresholds and testsThreshold power, threshold pace, critical swim speed and field tests you have done. The dimensions they can carry are scored directly.
- EstimatedFrom your training historyConnected activities are read for what they prove: long efforts, late-session fade, repeated hard work, fueling on long days. Each score says how it was read.
- ProxyFrom a stand-in, and named as oneWhere only an indirect signal exists, the score carries the proxy it came from and a lower confidence, never a number dressed as a measurement.
- UnmeasuredHonestly blankA dimension nothing in your data can answer stays unmeasured. It is never a zero, and the plan does not pretend to know it.
Every dimension ends in one word
- Develop the course asks more than you can show
- Maintain close enough to hold at the minimum dose
- Covered nothing to build here
- Unmeasured the course needs it, your data cannot say yet
Nymiva scores the same twelve dimensions twice. Once for the course, out of the file the organiser published. Once for you, out of your tested thresholds and whatever history you have connected, with each score carrying a note on how firm the reading behind it is. A dimension is a gap only where your side lands under the course's side. Each gap is then weighted by how much of the race day it occupies, and on a course whose bike leg swallows more hours than the other two together, a bike shortfall beats a swim shortfall of the same depth without a contest.
None of your data is in this page. So the 28 weeks below take the flattest assumption available, that your gaps sit exactly where Klagenfurt's demands are biggest, and build 5 developmental blocks from it, one lead dimension per sport per block, general work early and the course-shaped work held back for last. A member's season argues with this one about order and about dose. That argument is the product.
Train the bike to protect the run
Which demands matter most across the whole race. A leg's demand counts for as much of the day as that leg takes, so a score of 85 on the bike outweighs the same score on the swim.
- 01Aerobic enduranceBike leg, 53% of the day95 × 53%51
- 02Aerobic durabilityBike leg, 53% of the day93 × 53%50
- 03Muscular enduranceBike leg, 53% of the day92 × 53%49
The bike takes 53% of the Trained reference band’s day, so its demands carry the most race weight. What the bike leaves in the legs is what the run gets.
Which demand gets a block, and when
The engine freezes one lead focus per sport on every developmental block, holds the rest at maintenance, and verifies before it reprioritises.
An illustration, not your plan. This page has none of your data, so the season below is the engine’s answer to one stated assumption: that your gaps line up with what IRONMAN Kaernten-Klagenfurt, Austria demands. Your own season is built from your history, your thresholds, the days you can train and the races you have entered, and it will differ from this in its priorities, its sessions and its load.
- 01Run aerobic endurance, a development block4 weeks
- 02Bike muscular endurance, a practice block4 weeks
- 03Bike aerobic durability, a practice block6 weeks
- 04Bike aerobic endurance, a development block5 weeks
In the order the allocator places them, general first, most race-like last.
- Week 1PrepPrep
A lead-in week. It develops nothing by design.
- Weeks 2 to 9Foundation 1Closes with a recovery week
- PriorityBike aerobic endurance
- PriorityRun aerobic endurance
- PrioritySwim aerobic endurance
- SupportRun aerobic durability
- SupportBike aerobic durability
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportSwim aerobic durability
- SupportBike fueling resilience
- SupportRun fueling resilience
- SupportSwim fueling resilience
- Weeks 10 to 13Foundation 2Closes with a recovery week
- PriorityBike fueling resilience
- PriorityRun fueling resilience
- PrioritySwim fueling resilience
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportRun aerobic durability
- SupportSwim aerobic endurance
- SupportBike aerobic durability
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportSwim aerobic durability
- Weeks 14 to 17Foundation 3Closes with a recovery week
- PriorityBike muscular endurance
- PriorityRun muscular endurance
- PrioritySwim aerobic durability
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportRun aerobic durability
- SupportSwim aerobic endurance
- SupportBike aerobic durability
- SupportSwim muscular endurance
- SupportBike fueling resilience
- SupportRun fueling resilience
- SupportSwim fueling resilience
- Weeks 18 to 21Event shaping 1Closes with a recovery week
- PriorityRun aerobic durability
- PriorityBike aerobic durability
- PrioritySwim muscular endurance
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportSwim aerobic endurance
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim aerobic durability
- SupportBike fueling resilience
- SupportRun fueling resilience
- SupportSwim fueling resilience
- Weeks 22 to 25Event shaping 2Closes with a recovery week
- PriorityBike aerobic endurance
- PriorityRun aerobic endurance
- PrioritySwim aerobic endurance
- SupportRun aerobic durability
- SupportBike aerobic durability
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportSwim aerobic durability
- SupportBike fueling resilience
- SupportRun fueling resilience
- SupportSwim fueling resilience
- Weeks 26 to 27PeakPeak
The taper. Load comes down toward the race, content stays specific.
- Week 28RaceRace
Race week.
Held at maintenance between blocks
- Runaerobic endurance, aerobic durability, threshold durability, muscular endurance, fueling resilience
- Bikemuscular endurance, aerobic durability, aerobic endurance, threshold durability, fueling resilience
- Swimaerobic endurance, aerobic durability, threshold durability, muscular endurance, technical skill, fueling resilience
Touches scheduled by each capability’s own decay, at a fraction of its development dose, so earlier work is still there on race day.
The sessions the blocks are built from
One entry per kind of work the block trains, at the intensity that work is meant to be done at. Where the same work runs at several lengths, the entry shows the span it grows across rather than one entry per length.
- Foundation 1 · Weeks 2 to 975 to 240 min
150 to 210 min at Zone 2
BikePower, Zone 2Trains aerobic capacity - Foundation 1 · Weeks 2 to 940 to 270 min
180 to 210 min at Zone 3, then 30 min at Zone 4
BikePower, Zone 3Trains aerobic capacity - Foundation 1 · Weeks 2 to 935 to 120 min
90 min at Zone 2
RunPace, Zone 2Trains aerobic capacity - Foundation 1 · Weeks 2 to 950 min
4 x 1.5 min at Zone 3, 6 min easy between
RunHeart rate, Zone 3Trains aerobic capacity - Foundation 1 · Weeks 2 to 945 to 51 min
4 x 8 min at Zone 2, 1 min easy between
SwimPace, Zone 2Trains aerobic capacity - Foundation 1 · Weeks 2 to 947 to 81 min
3 x 1000 m at Zone 3, 0.3 min easy between
SwimPace, Zone 3Trains aerobic capacity
12× rolling-course surges
1.5 min at Zone 5, then 1.5 min at Zone 5, then 1.5 min at Zone 5, then 1.5 min at Zone 5, then 1.5 min at Zone 5, then 1.5 min at Zone 5, then 1.5 min at Zone 5, then 1.5 min at Zone 5, then 1.5 min at Zone 5, then 1.5 min at Zone 5, then 1.5 min at Zone 5, then 1.5 min at Zone 5, 11.5 min easy between
Compiled by the deterministic course compiler from the organiser’s file: the course’s one repeatable requirement, rehearsed at a dose the progression allows.
- Bike
- 170 min
- Trains threshold durability
- Supports muscular endurance
- Supports high intensity capacity
28 weeks, laid out backwards from race day
The shortest runway Nymiva builds for this event type, with its blocks, recovery weeks, taper and race week in place.
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- 28
- Prep
- Foundation
- Event shaping
- Peak
- Race
- Recovery week
Your own season carries these same phases on your own dates, with the load solved from your fitness and the days you can train, and it changes when your data does.
What each level does on the day
Reference finish times per peer band, the pacing plan the model holds each band to, and where the day is decided.
| Band | Swim | Bike | Run | Finish |
|---|---|---|---|---|
| Recreational2:11 /100m critical swim speed · 2.47 W/kg at 75 kg · 6:08 /km threshold pace | 1:34:41 | 7:16:19 | 5:08:48 | 14:09:48 |
| Trained1:51 /100m critical swim speed · 3.03 W/kg at 75 kg · 5:06 /km threshold pace | 1:20:13 | 6:34:31 | 4:16:47 | 12:21:31 |
| Competitive1:36 /100m critical swim speed · 4.15 W/kg at 75 kg · 4:20 /km threshold pace | 1:09:23 | 5:48:25 | 3:38:11 | 10:45:59 |
| Elite1:26 /100m critical swim speed · 5.27 W/kg at 75 kg · 3:50 /km threshold pace | 1:02:09 | 5:17:54 | 3:13:00 | 9:43:03 |
Pacing plan
- 0 km0.3%27.7 km/h12:34
- 5.79 km-3%44.4 km/h0:35
- 6.22 km0.1%28.7 km/h3:36
- 7.94 km3.9%13.7 km/h1:48
- 8.35 km0.3%27.7 km/h30:04
- 22.2 km-3.8%48.1 km/h0:43
- 22.8 km0%29.2 km/h6:09
- 25.8 km4%13.5 km/h1:39
65 more segments in the full plan.
- Run: reach 4:20 /km and this course gives back 1:35:32.
Where it is decided
Between kilometre 141 and kilometre 162. Five climbs inside 21 kilometres, and the longest of the whole day is one of them, 2060 m at 6.5 percent starting at kilometre 153.6 with a marathon still ahead.
Everything earlier sets that trap. The steepest pitch of the race comes at kilometre 33 on fresh legs and accounts for 2 percent of the bike leg, which is almost nothing, which is precisely why riders stand up on it and file it under free. Then 20.7 km of flat from kilometre 78 lets the average heal. Then the gradients come back and keep coming back to kilometre 162.
Descending will not refund you. A Trained rider's plan gives 75 minutes to climbing and 15 to descending. Height returns in half-kilometre bursts at 45 to 56 km/h, quick and over quickly, and the longest drop on the course lasts about a minute. There is nowhere out there to sit up for ten minutes and eat.
Look at the session the engine compiled from this bike file. Twelve surges of a minute and a half, with eleven and a half minutes of recovery patterned on the course between them. That spacing is not a coaching convention. It is the road.
Getting it wrong
It begins the winter before. Read Carinthia, train hour-long ascents, and you arrive fluent in something this race never asks for. Its longest climb takes a Trained rider 13 minutes and its steepest is 1079 m from bottom to top. What it asks is the same number, 17 times, with the last five bunched into the closing 40 kilometres.
The second mistake is the back half of the run. Flat and fast is how the organiser describes it and the engine agrees, 57 percent of the run leg in one block after kilometre 18, out along the water toward Krumpendorf with nothing in the profile to cut it into pieces. Flat road hands you no reason to change pace. It also hands you no excuse when you do.
The third is arithmetic. You cannot ride a course at a number you picked while climbing. Seventy-nine percent of a Trained rider's bike leg happens on flat ground, and that is the figure that writes the marathon, whatever the hills did to your legs on the way past.
Conditions on the day
- 2026high 28 C, low 13 Cwater 21 C
- 2025high 30 C, low 14 Cwater 22 C
- 2024high 16 C, low 10 Cwater 19 C
From the organiser’s own records. Not a forecast.
Every session is a claim, every block is a test
A plan is not a calendar. Each key session states what it trains and how that is checked, and each block ends with a public verdict before the next one is chosen.
What a block promises
Bike aerobic endurance moves from your baseline to a stated target by the end of Foundation 1
- The baseline is your measured score when the block starts. The target is the score the model predicts for it.
- Verified at the block’s recovery week, by a field test or a refresh of the supply read from your history.
- Confidence rises by agreement between independent signals, never by one metric crossing a line.
- A block that misses its target is a public miss. The next block is chosen from what was proven, not from what was planned.
- 01Stimulus achievedThe work landed in the zone the session named, for the dose it named.
- 02Partially achievedSome of the work landed. The session banks what it can prove.
- 03Not achievedThe load may have been there. The stimulus was not, so nothing is banked.
- 04Data insufficientNo usable stream. The session is neither credited nor blamed.
- Session verified
- Progression banked
- Block verified
- Priority reassessed
- Plan adapted
Your numbers, this course
Analyze IRONMAN Kaernten-Klagenfurt, Austria against my fitness
The same simulation and the same Focus Lab read, on your thresholds instead of a band’s. Three numbers give a finish estimate and a partial read. A connected history gives the whole table.
The first 14 days are free.
- Trained band finish
- 12:21:31
- Of the day on the bike
- 53%
- Dimensions scored per leg
- 12
- Season runway shown
- 28 wk
Questions people ask
- How hilly is the IRONMAN Kaernten-Klagenfurt bike course?
- Hilly in bursts. The engine reads 17 climbs across the 180.1 km of bike course, carrying 1512 m of ascent between them, and only 14.1 km of the road points uphill. The steepest is 1079 m at 7.2 percent at kilometre 33, and the longest by time waits until kilometre 153.6.
- What water temperature should I expect in Lake Wörthersee?
- The organiser records 21 C in 2026, 22 C in 2025 and 19 C in 2024. Air over those same three editions ran to a high of 30 C and down to a low of 10 C, so the lake is by far the steadier number of the two.
- Is the run course really flat?
- Yes. The 42.3 km carry 101 m of climbing in total, and the profile holds one rise, 154 m at 3.2 percent just before kilometre 18. Everything either side of it is level road through the Klagenfurt city centre and out along the lake toward Krumpendorf.
- How long should a plan for this race be?
- The illustrative season on this page runs 28 weeks, with five developmental blocks and a two-week taper. That is the shortest runway Nymiva lays out for a full-distance triathlon. Your own season starts from your own numbers and can be longer than this one.
Course data from the organiser’s published files, analysed 23 Sept 2026 by engine 1, demand model 4. Reference times are simulated for a peer band at a stated reference athlete and are not a prediction for anyone. Nothing on this page is medical advice.
IRONMAN® and IRONMAN 70.3® are registered trademarks of World Triathlon Corporation. Nymiva is an independent training platform and is not affiliated with, sponsored by or endorsed by World Triathlon Corporation. Course data is read from the organiser’s public course pages for the purpose of describing the event.