IRONMAN 70.3 · Ruidoso · 11 Jul 2027
How to train for IRONMAN 70.3 Ruidoso New Mexico
The organiser sells this race as Race the Peaks, with Sierra Blanca on the horizon and a bike course it calls hilly. People read that and train for mountain passes. There are none. The steepest sustained rise on the bike is 305 m at 5.6 percent, and a rider who has spent the spring on steep climbs has trained for a race that is not in Ruidoso.
What Ruidoso has instead is height and heat. The bike file starts at 2,110 m and never drops below 1,775 m. The run never leaves the narrow band between 2,072 m and 2,113 m. The organiser logged highs of 31 C and 32 C in the last two editions. A Trained athlete's day of 5:57:40 is decided on a gradient most riders would not call a climb at all.
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
- Bike89.9 km786 m upCourse file
- Run21.1 km270 m upCourse file
The swim is 2 laps of Grindstone Lake, 1.9 km of water the organiser describes as clear and cool and logged at 18 C in 2026, the only year it publishes a figure.
The bike leaves the lake, runs through town to the highway and heads out to Hondo on what the organiser calls pristine pavement, then comes back into town. One loop, 89.9 km, 786 m of climbing. The profile reads as four long pieces. The first 27 km fall about 330 m. The next 18 km climb back by about 190 m. Then the road falls again, to the low point of the course near kilometre 63, and the last 27 km climb about 310 m to the dismount. Inside those pieces the road mostly sits between 1 and 2 percent, broken by kicks of a few hundred metres at 3.5 to 5.6 percent.
The run is 21.1 km through the mountain village and its neighbourhoods, finishing in the heart of Midtown, with 270 m of climbing. The organiser calls it rolling and the file agrees. There are short rises and falls of 4 to 5 percent, one ramp of 176 m at 7.4 percent that the file carries twice, at 5.5 km and again at 19.6 km, and two long flat stretches in between. The organiser also asks you to keep a lookout for horses, deer and elk.
Course shape by distance
- Flat 81%
- Climbing 8%
- Descending 11%
The longest stretches
- Run, climbing0.18 km1% of the run
- Run, flat3.24 km16% of the run
- Run, flat2.75 km14% 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 comes first. Environmental resilience scores 90 on every leg, ahead of anything the terrain produces, and the organiser's own record is the reason: 31 C in 2026, 32 C in 2025, 26 C in 2024. Behind it sit the bike's aerobic endurance at 85 and muscular endurance at 82, then threshold capacity at 70 and threshold durability at 69. The bike fills more than half of a Trained athlete's day, so the first seven demands in the cross-leg ranking are all bike demands.
The run's reading is the more interesting one. Muscular endurance reads 83 there, and technical skill reads 62 against 38 on the bike. That is the run's turns and its short descents through the neighbourhoods, taken on legs that have just ridden for three hours. High-intensity capacity reads 58 on the bike and 53 on the run, and it comes from the kicks. Feed the bike file to the engine and it hands back twelve short efforts, each three quarters of a minute above threshold that roll without a pause into two and a half minutes of Zone 4, with thirty seconds of easy spinning before the next. That is the climb home in miniature: a steep few hundred metres, then a drag that never lets you recover.
Now the bands. A Trained athlete swims 38:50, rides 3:08:13 at 182 W and runs 2:00:37, for 5:57:40. The Competitive band finishes in 5:12:34 from 4.15 W/kg at 75 kg and 4:20 /km threshold pace, 22 minutes faster on the bike and 18 on the run. Very little of that bike gap is made on the way out. The Competitive rider gains more than twice as much on the last 27 km as on the first 27, because the first 27 fall all the way and the last 27 climb all the way.
- 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
Nymiva reads the same twelve dimensions twice. Once off the course, from the file on this page. Once off the athlete, from thresholds and connected training history, with every score noting where it came from and how far to trust it. A dimension becomes a gap only where the course asks more than the athlete can show, and the gaps are weighted by how much of the day they fill. With the bike at more than half the day and the swim near a ninth of it, a bike gap here outranks a bigger one in the lake.
No athlete stands behind this page, so its season cannot know anyone's gaps. It takes the plainest case, that they sit where the demands are largest, and lays out 24 weeks in 5 developmental blocks closed by a two-week taper. Aerobic endurance opens the season in all three sports. Threshold durability leads the second block on the bike and the run while the swim works on aerobic durability. Threshold capacity leads the third everywhere, muscular endurance the fourth, and aerobic endurance returns to lead the last block before the taper. A member's season is built from their own numbers and will argue with 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, 53% of the day90 × 53%47
- 02Aerobic enduranceBike leg, 53% of the day85 × 53%45
- 03Muscular enduranceBike leg, 53% of the day82 × 53%43
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 70.3 Ruidoso New Mexico 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
- SupportBike threshold durability
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportRun threshold durability
- SupportSwim aerobic durability
- Weeks 6 to 9Foundation 2Closes with a recovery week
- PriorityBike threshold durability
- PriorityRun threshold 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 threshold durability
- SupportRun threshold 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
- SupportBike threshold durability
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportRun threshold 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
- SupportBike threshold durability
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportRun threshold 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, technical skill
- 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
12× climb-to-false-flat repeats
0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, then 0.8 min at Zone 5, then 2.5 min at Zone 4, 0.5 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
- 70 min
- Trains muscular endurance
- Supports strength force
- Supports anaerobic capacity
- Supports threshold durability
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 | 3:25:18 | 2:25:03 | 6:46:11 |
| Trained1:51 /100m critical swim speed · 3.03 W/kg at 75 kg · 5:06 /km threshold pace | 0:38:50 | 3:08:13 | 2:00:37 | 5:57:40 |
| Competitive1:36 /100m critical swim speed · 4.15 W/kg at 75 kg · 4:20 /km threshold pace | 0:33:35 | 2:46:30 | 1:42:29 | 5:12:34 |
| Elite1:26 /100m critical swim speed · 5.27 W/kg at 75 kg · 3:50 /km threshold pace | 0:30:05 | 2:32:03 | 1:30:40 | 4:42:48 |
Pacing plan
- 0 km-8.2%66.3 km/h0:23
- 0.43 km-1.8%39.7 km/h0:41
- 0.87 km-4.9%53.7 km/h0:53
- 1.66 km-1.5%38.2 km/h6:49
- 6 km-3.4%47.2 km/h0:25
- 6.32 km-0.2%31.8 km/h6:06
- 9.55 km-4.5%52 km/h0:23
- 9.88 km-1.2%36.8 km/h6:34
76 more segments in the full plan.
- Run: reach 4:20 /km and this course gives back 45:06.
Where it is decided
On the drag back into town.
From the low point near kilometre 63 to the dismount, the road gains about 310 m in 27 km. Almost none of it looks like a climb. It is long stretches at 1 to 2 percent with a kick every few kilometres, and it fills more than a third of a Trained athlete's bike time. It also comes last, after two hours in the saddle, at an altitude where the organiser's own mayor talks about the challenge of competing at elevation.
A rider who treated the way out like a mountain stage, standing up on every kick on the way to the far end of the course, meets this drag with nothing left. A 1 percent grade at a power you can no longer hold costs more than a 5 percent kick at one you can. Hold 182 W going out and coming back, and let the descents be free.
Then the run, which starts close to four hours into the day for a Trained athlete, above 2,000 m, on a day the organiser logged at 32 C in 2025. The engine puts 15.8 percent of the run leg on one flat stretch just after the first 7.4 percent ramp, and 13.6 percent on another from 14 km. Those two stretches are where whatever the drag home cost you gets collected.
Getting it wrong
Most riders get the opening 27 km wrong. They fall from Grindstone Lake all the way, the legs are fresh, and the speed is enormous for no effort. Riders push anyway, because the field is together and the road rewards it with numbers on the computer. Effort spent descending buys seconds. The same effort saved for the climb home buys minutes.
The second mistake is training for the wrong mountain. Strength and force reads 45 on the bike against 85 for aerobic endurance, and no steep kick on the bike runs much past 600 m. Ruidoso punishes riders who cannot hold a steady number for hours at altitude in the heat. It hardly notices whether they can climb.
The third mistake is the 7.4 percent ramp on the run, the second time. At 5.5 km it is a short pitch on fresh legs. At 19.6 km, with Midtown close enough to hear, it is the steepest thing on the course. Take it at the effort you gave it the first time, not the pace.
Conditions on the day
- 2026high 31 C, low 14 Cwater 18 C
- 2025high 32 C, low 14 C
- 2024high 26 C, low 12 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 Ruidoso New Mexico 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
- 5:57:40
- Of the day on the bike
- 53%
- Dimensions scored per leg
- 12
- Season runway shown
- 24 wk
Questions people ask
- How hilly is the IRONMAN 70.3 Ruidoso New Mexico bike course?
- The organiser calls it hilly. The one-loop ride out to Hondo and back climbs 786 m, but the steepest sustained rise is only 305 m at 5.6 percent. Most of the climbing is long drags at 1 to 2 percent, and the biggest of them is the last 27 km back into town.
- How high is the IRONMAN 70.3 Ruidoso New Mexico course?
- High. The bike file starts at 2,110 m and its lowest point is 1,775 m, near kilometre 63. The run stays between 2,072 m and 2,113 m from start to finish in Midtown.
- What is the water temperature in Grindstone Lake?
- The organiser logged 18 C in 2026, the only edition it publishes a water figure for, and describes the lake as clear and cool. The wetsuit decision is not on the organiser's course page, so check it in race week.
- How hot does IRONMAN 70.3 Ruidoso New Mexico get?
- The organiser recorded highs of 31 C in 2026, 32 C in 2025 and 26 C in 2024. A Trained athlete starts the run close to four hours into the day, so that is where the heat lands.
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.