IRONMAN 70.3 · Salem · 18 Jul 2027
How to train for IRONMAN 70.3 Oregon
Oregon sells speed, and it has the goods. A downriver swim, a bike course the organiser calls fast and flat, a run it calls relatively flat, and a start list full of first-timers and people chasing a personal best. So people arrive ready to race a fast course. What they forget is the weather.
The organiser logged highs of 32 C in 2024 and 31 C in 2025. The demand model reads that heat as the largest single demand of the day in Salem, ahead of aerobic endurance, on every leg. The profile is the easy part. The hard part is reaching the flat 21.3 km with something left to run it on.
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.
- Swim1.93 kmDistance only
- Bike90.2 km326 m upCourse file
- Run21.3 km89 m upCourse file
The swim is point to point. You enter the Willamette River at Minto Brown Island Park and let the current carry you downriver along the buoy lines to Riverfront Park, 1.9 km in water the organiser logged at 22 C in 2025 and 22 C a year earlier.
The bike is one out-and-back of 90.2 km through the suburbs and down country roads beside the river, out into the farms and wineries of Oregon's wine country. It climbs 326 m in total, nearly all of it in short rises in the first 26 km and the last 27. The steepest is 483 m at 7.7 percent near kilometre 21. Because the road comes back the same way, you drop down that same ramp near kilometre 68. Between kilometre 26 and kilometre 64, with the turnaround in the middle, the file reads as one unbroken flat stretch of more than 37 km.
The run starts and finishes at Riverfront Park and goes out and back through a nature preserve and along the river, on paved park trails that swap shade for sun and back again. It climbs 89 m. Across the whole day, 95 percent of the course is flat by distance.
Course shape by distance
- Flat 95%
- Climbing 3%
- Descending 2%
The longest stretches
- Bike, climbing0.48 km2% of the bike
- Bike, flat37.3 km41% of the bike
- Run, flat21.3 km100% 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.
Heat tolerance before anything else. Environmental resilience scores 90 on the swim, the bike and the run, and it tops the cross-leg ranking because the bike fills more than half of a Trained athlete's day. Aerobic endurance follows at 85 on every leg. Muscular endurance reads 81 on the bike and on the run, with threshold capacity at 70 behind it.
The rises leave a mark, but a faint one. High-intensity capacity scores 57 on the bike against 40 on the run and the swim, and strength and force scores 47 on the bike against 30 on the run. Hand this bike file to the engine and ask it for a session, and what comes back is ten hard efforts of three quarters of a minute, each one followed by more than eight minutes of easy spinning. That is the honest shape of the climbing in Salem. Short, far apart, over before it hurts. A Trained athlete spends under twelve minutes of a three-hour ride going uphill.
Put the bands beside it. A Trained athlete swims 38:50, rides 2:59:50 at 182 W and runs 2:00:26, for 5:49:06. The Competitive band finishes in 5:05:00 from 4.15 W/kg at 75 kg and 4:20 /km threshold pace. That is 21 minutes found on the bike and 18 on the run. On a course this flat the bike minutes are almost pure steady power. The run minutes are the ones the heat gets a vote on.
- Environmental resilience90
- Aerobic endurance85
- Muscular endurance80
- Threshold capacity70
- Aerobic durability65
- Threshold durability65
- Fueling resilience55
- Technical skill55
- High-intensity capacity40
- Anaerobic capacity25
- Strength / force20
- Sprint power5
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
Every course and every athlete gets scored on the same twelve dimensions. For the race, the scores come from the course files and the conditions the organiser logs. For you, they come from your thresholds and your connected training history, and each one carries a note saying what it was read from and how much to trust it. Only where the course asks for more than you can show is there a gap. Gaps then get weighted by how much of the day they occupy, so in Salem, where the bike fills over half the day and the swim barely a ninth, a bike gap wins every argument with a swim gap of equal size.
Nobody's data sits behind this page. The season under it therefore makes the plainest assumption available, that the gaps fall where the demands are largest, and spreads 24 weeks over 5 developmental blocks and a two-week taper. Aerobic endurance leads the opening block in all three sports. Aerobic durability takes the second, threshold capacity the third, muscular endurance the fourth, and aerobic endurance returns for the last block before the taper. A member's own season starts from their numbers, and it will not look like this one.
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.
- 01Environmental resilienceBike leg, 52% of the day90 × 52%46
- 02Aerobic enduranceBike leg, 52% of the day85 × 52%44
- 03Muscular enduranceBike leg, 52% of the day81 × 52%42
The bike takes 52% 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 70.3 Oregon 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 muscular endurance, a practice block4 weeks
- 02Run aerobic endurance, a development block4 weeks
- 03Bike muscular endurance, a practice block4 weeks
- 04Bike aerobic endurance, a development block4 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 5Foundation 1Closes with a recovery week
- PriorityBike aerobic endurance
- PriorityRun aerobic endurance
- PrioritySwim aerobic endurance
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportBike aerobic durability
- SupportRun aerobic durability
- SupportSwim aerobic durability
- Weeks 6 to 9Foundation 2Closes with a recovery week
- PriorityBike aerobic durability
- PriorityRun aerobic durability
- PrioritySwim aerobic durability
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportSwim aerobic endurance
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- Weeks 10 to 13Foundation 3Closes with a recovery week
- PriorityBike threshold capacity
- PriorityRun threshold capacity
- PrioritySwim threshold capacity
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportSwim aerobic endurance
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportBike aerobic durability
- SupportRun aerobic durability
- SupportSwim aerobic durability
- Weeks 14 to 17Event shaping 1Closes with a recovery week
- PriorityBike muscular endurance
- PriorityRun muscular endurance
- PrioritySwim muscular endurance
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportSwim aerobic endurance
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportBike aerobic durability
- SupportRun aerobic durability
- SupportSwim aerobic durability
- Weeks 18 to 21Event shaping 2Closes with a recovery week
- PriorityBike aerobic endurance
- PriorityRun aerobic endurance
- PrioritySwim aerobic endurance
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportBike aerobic durability
- SupportRun aerobic durability
- SupportSwim aerobic durability
- Weeks 22 to 23PeakPeak
The taper. Load comes down toward the race, content stays specific.
- Week 24RaceRace
Race week.
Held at maintenance between blocks
- Runmuscular endurance, aerobic endurance, aerobic durability, threshold capacity, threshold durability
- Bikemuscular endurance, aerobic endurance, aerobic durability, threshold capacity, threshold durability
- Swimaerobic endurance, aerobic durability, threshold capacity, threshold durability, muscular endurance
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 575 to 240 min
150 to 210 min at Zone 2
BikePower, Zone 2Trains aerobic capacity - Foundation 1 · Weeks 2 to 540 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 535 to 120 min
90 min at Zone 2
RunPace, Zone 2Trains aerobic capacity - Foundation 1 · Weeks 2 to 550 min
4 x 1.5 min at Zone 3, 6 min easy between
RunHeart rate, Zone 3Trains aerobic capacity - Foundation 1 · Weeks 2 to 545 to 51 min
4 x 8 min at Zone 2, 1 min easy between
SwimPace, Zone 2Trains aerobic capacity - Foundation 1 · Weeks 2 to 547 to 81 min
3 x 1000 m at Zone 3, 0.3 min easy between
SwimPace, Zone 3Trains aerobic capacity
10× course-matched climbs
0.8 min at Zone 5, then 0.8 min at Zone 5, then 0.8 min at Zone 5, then 0.8 min at Zone 5, then 0.8 min at Zone 5, then 0.8 min at Zone 5, then 0.8 min at Zone 5, then 0.8 min at Zone 5, then 0.8 min at Zone 5, then 0.8 min at Zone 5, 8.5 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
- 109 min
- Trains anaerobic capacity
- Supports strength force
- Supports muscular endurance
24 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.
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 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 | 0:45:50 | 3:15:12 | 2:24:51 | 6:35:53 |
| Trained1:51 /100m critical swim speed · 3.03 W/kg at 75 kg · 5:06 /km threshold pace | 0:38:50 | 2:59:50 | 2:00:26 | 5:49:06 |
| Competitive1:36 /100m critical swim speed · 4.15 W/kg at 75 kg · 4:20 /km threshold pace | 0:33:35 | 2:39:05 | 1:42:20 | 5:05:00 |
| Elite1:26 /100m critical swim speed · 5.27 W/kg at 75 kg · 3:50 /km threshold pace | 0:30:05 | 2:25:17 | 1:30:32 | 4:35:54 |
Pacing plan
- 0 km0%30.8 km/h12:03
- 6.19 km3.7%15.9 km/h1:02
- 6.46 km0.5%28.4 km/h1:43
- 7.27 km-3.1%45.8 km/h0:20
- 7.52 km-0.3%32.3 km/h6:02
- 10.8 km4.7%13.5 km/h1:19
- 11.1 km-1.1%36.3 km/h1:50
- 12.2 km3%18 km/h0:53
27 more segments in the full plan.
- Run: reach 4:20 /km and this course gives back 44:06.
Where it is decided
On the long flat middle of the bike. The bill arrives on the run.
The 37 km between kilometre 26 and kilometre 64 hold 40 percent of the bike leg, the largest single stretch of the ride. Nothing on that road meters your effort. The turnaround sits halfway along it, and on the way back you pass the riders still heading out, which tells you the day is going well whether it is or not. A rider who holds 182 W through that stretch has done nothing heroic. A rider who holds more than that feels no different at all, until the run.
The run is where the heat and the bike settle their account. A Trained athlete leaves Riverfront Park nearly four hours after the gun, on a day that reached 32 C in 2024. The course reads as one flat segment, 2:00:26 from an input of 5:06 /km threshold pace, so there is no climb to blame and nowhere to hide a pacing mistake. The shaded stretches are where you recover. The sunny ones are where the extra watts get paid back, with interest.
Getting it wrong
The first mistake happens in the water. The current does a share of the work, the swim runs point to point, and swimmers read that as permission to go hard. The river hands you speed for nothing. Spending effort to squeeze out a little more of it is a poor trade on a course where the run decides everything.
The second is the opening 21 km. Suburbs, a string of short rises and a field still packed together. Riders answer each rise with a surge and arrive at the 7.7 percent ramp already over their plan. That ramp takes a Trained athlete a little over three minutes. Ride it at the power you held on the flat, then sit down and let the descent pay you back.
The third is the run pace. Athletes in the organiser's 2024 survey voted this the third best run course on the whole circuit worldwide, it is flat, and everyone arrives with a pace they rehearsed in cooler weather. On a 31 C day that pace is a plan for the first half and a debt for the second. Run the shade and the sun at the same effort rather than the same pace, and use the turnaround to count who went out too fast.
Conditions on the day
- 2026high 28 C, low 12 C
- 2025high 31 C, low 13 Cwater 22 C
- 2024high 32 C, low 13 Cwater 22 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 70.3 Oregon 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
- 5:49:06
- Of the day on the bike
- 52%
- Dimensions scored per leg
- 12
- Season runway shown
- 24 wk
Questions people ask
- How hilly is the IRONMAN 70.3 Oregon bike course?
- Barely. The out-and-back 90 km climbs 326 m in total, and 95 percent of the whole course is flat by distance. The steepest rise is 483 m at 7.7 percent near kilometre 21, and because the road comes back the same way, you ride down it again near kilometre 68.
- Is the IRONMAN 70.3 Oregon swim really downriver?
- Yes. The organiser describes a point-to-point swim with the current of the Willamette River, entering the water at Minto Brown Island Park and finishing at Riverfront Park. The water was logged at 22 C in both 2025 and 2024. The wetsuit decision is not on the course page, so check it in race week.
- How hot is IRONMAN 70.3 Oregon?
- The organiser logged highs of 32 C in 2024, 31 C in 2025 and 28 C in 2026. The run is out and back along the Willamette River with spots of both shade and sun, and a Trained reference athlete starts it nearly four hours after the gun.
- How long is the season on this page?
- The illustrative season runs 24 weeks, with five developmental blocks and a two-week taper. It is built from the course alone. A member's season starts from their own numbers and can be longer.
Course data from the organiser’s published files, analysed 24 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, and 5150 is a trademark, 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.