Strava vs TrainingPeaks vs NavRun: Ultras
Strava vs TrainingPeaks vs NavRun: The Honest App Comparison for Ultra Runners¶
If you've ever finished a 50-miler, opened your phone, and watched Strava cheerfully announce a "trail run" with an average pace 90 seconds per mile slower than your road tempo — and felt nothing — you already know the problem.
Most running apps were built for the marathon. They optimize around pace, weekly mileage, and a tidy weekly long run. Ultras don't fit that mold. A 12,000 ft vertical day at 18 min/mile pace is a brutal training session. A flat 10-mile road run at 8 min/mile is a different stimulus entirely — neither easy nor hard, just incomparable. Pace alone can't tell those apart, but most apps still treat pace as the headline metric.
This is an honest comparison of the three platforms ultra runners actually use day to day: Strava, TrainingPeaks, and NavRun. We'll cover:
- What each app does well for ultra training (and where it breaks down)
- Why pace-based metrics like rTSS struggle on technical terrain
- The metrics that actually matter for 50K through 100-mile training
- How experienced ultra runners stack these tools rather than choose one
Full disclosure: I built NavRun. I'll try to be specific about what it does and doesn't do, and I'll acknowledge where Strava and TrainingPeaks are clearly better. The goal here is for you to leave with a clearer picture of your stack — not a sales pitch.
Why Ultras Break Most Running Apps¶
Marathon-focused apps make a few quiet assumptions:
- Pace is a meaningful proxy for effort
- Distance is the primary training variable
- Long runs are 2–3 hours, not 6–10
- Terrain is roughly flat and consistent
- Walking is a sign something went wrong
Every one of those assumptions falls apart in ultras. A 100-mile training week might include a 30-mile mountain day where you never crack 4 mph going up the climbs and intentionally hike the steepest 3 miles. By marathon-app logic, that's a slow, partial-effort run with a "deviation." By ultra logic, it's a killer training stimulus.
TrainingPeaks itself acknowledges this: rTSS (running Training Stress Score, calculated from pace) is "not accurate when conditions are windy, terrain is hilly, or ground is rough." For mountain athletes, that's most days.
So the real question isn't "which app is best?" It's: which app handles which part of your ultra training well, and where do the gaps live?
Strava: The Default Social Layer¶
Strava is where almost every ultra runner ends up storing their data, even when they pay for something else. Garmin, COROS, Suunto, and Apple Watch all sync to it cleanly, and most third-party apps (including TrainingPeaks and NavRun) read from it.
What Strava Does Well for Ultras¶
- Activity logging and history. It's the cleanest, longest-standing record of your running.
- Heatmaps for route discovery. Vert and Komoot integrate Strava's heatmap concept, but Strava's own global heatmap is unmatched for finding trails real runners use.
- Segments on long climbs. Useful for benchmarking yourself on a familiar climb week to week.
- Community. Followers, kudos, club challenges. Ultra training is lonely; Strava makes it less so.
- GPX export and integration. Your data is portable.
Where Strava Struggles for Ultras¶
- Pace is the headline. The activity feed leads with pace and distance. For a 6,000 ft training day, those numbers are the least interesting thing about it.
- Elevation smoothing can under-count vertical. Strava applies aggressive smoothing to GPS-only elevation data and sets a 10-meter threshold before climbing counts. Per Strava's own elevation FAQ, this is by design — but it means trail runs sometimes show less vertical than your watch did.
- Training Plans were retired. Strava removed its native training plans in 2023, leaving a gap most ultra runners now fill with another tool.
- Strava Fitness (the CTL-style line) is opaque. It's pace-weighted and doesn't credit elevation properly. Plenty of users have pointed out this divergence between Strava Fitness and TrainingPeaks CTL.
- No structured planning. You can't lay out a 24-week mountain block.
Verdict: Strava is excellent as the storage layer and social network. It's a poor choice as your primary ultra training brain.
TrainingPeaks: The Coach's Platform¶
TrainingPeaks is where most coached athletes — including a huge number of UTMB-bound trail runners — track structured plans. If you have a coach, you'll likely end up here regardless of what you'd choose on your own.
What TrainingPeaks Does Well for Ultras¶
- Periodization and the ATP (Annual Training Plan). You can lay out an entire ultra build in advance and adjust as you go.
- CTL/ATL/TSB ("Performance Management Chart"). The fitness-fatigue-form model is the closest thing to a standard in endurance sports.
- Workout structure. Coaches can prescribe specific intervals, hill repeats, or back-to-back blocks, and you get a green/yellow/red compliance check after.
- Heart-rate-based and power-based TSS. hrTSS and power-based scores work much better than rTSS for trail terrain.
- Race-day workout export. You can push a structured race-day target plan straight to your watch.
Where TrainingPeaks Falls Short for Ultras¶
- Pace-based rTSS is broken for mountain running. TrainingPeaks itself notes that rTSS is not accurate on hilly or rough terrain. NGP (Normalized Graded Pace) helps, but it's still a pace abstraction.
- It assumes you have a coach. The DIY athlete experience is functional but austere. The plan you build by yourself is only as good as your knowledge.
- The UI is a 2014 web app. Workable on desktop, frustrating on mobile.
- Pricing is steep for self-coached athletes. The Premium tier runs around $124.99/year, and the Coached experience is on top of that.
- Limited trail-specific intelligence. TrainingPeaks doesn't know that your Sunday long run was 7,000 ft of vert on technical singletrack — it just sees the average pace and HR.
- Race predictions are pace-extrapolated. They don't account for elevation gain, technical terrain, or aid station strategy that defines ultra finishing times.
Verdict: TrainingPeaks is the right home for a coached athlete or a data-fluent self-coached runner who already understands periodization. It's overkill — and underbuilt for trail context — for someone who just wants ultra-aware insights without a PhD in sports science.
NavRun: Built for Ultra Context¶
I built NavRun because my own ultra training stack — Strava + spreadsheets + a TrainingPeaks subscription I barely used — had clear gaps. I wanted something that read my Strava data and produced ultra-aware coaching, race predictions, and risk alerts without me having to interpret CTL myself.
I'll be specific about what it does today, because vague feature lists are how you get burned by software.
What NavRun Does¶
- AI training plans for 5K through 100-mile. The plan generator supports ultra distances explicitly and produces elevation-progressive blocks for mountain races, including power-hiking guidance for steep sections.
- Race predictions for ultras. The race predictor handles 50K, 50M, 100K, and 100M with elevation-gain adjustments rather than pure Riegel pace extrapolation. See predictions in action.
- Training load with ACWR injury alerts. Analytics tracks acute:chronic workload ratio, monotony, and TSB so you get a heads-up when a build is tipping into risk territory. (Background on ACWR for endurance runners.)
- Weekly training reports written in plain English. Instead of staring at a CTL graph, you get a paragraph summarizing what the week did and what to watch for next.
- Hiking time counted toward training load. Sessions of 2+ hours register as significant training load rather than leisure walks. The 2-hour floor is imperfect — a 45-minute weighted vertical hike is real work that this misses — but it's a meaningful step beyond "ignore all non-running movement."
- Cross-training and terrain awareness. Activity types track terrain (road, gravel, dirt trail, singletrack, technical), so a 30-mile technical day isn't lumped in with road tempo runs.
- Connects directly to Strava. No separate logging required.
What NavRun Doesn't Do (Yet)¶
- No segment competition. If you live for KOMs, stay on Strava.
- No social feed. I deliberately didn't build one. There are plenty of social apps; runners told me they wanted something quieter.
- No live tracking for crew. If you want a "where is my runner right now" screen for a 100-miler, look at separate dot-tracker apps.
- No native workout-to-watch sync. You can read from Strava, but pushing structured workouts to a Garmin head unit isn't there yet.
- No coach view for athletes. If you're a coach with multiple athletes, TrainingPeaks remains the better choice today.
Verdict: NavRun is built for the self-coached or semi-coached ultra runner who wants ultra-aware analysis without operating TrainingPeaks. It is not a replacement for Strava (it sits on top of it) and not a fit if you need a multi-athlete coach dashboard.
The Metrics That Actually Matter for Ultras¶
Pace is one of nine or ten metrics that matter for ultra training. Any app you pick should treat the others seriously. Here's what to look for:
1. Time on Feet¶
For 50-mile and longer races, total weekly time on feet correlates better with race readiness than mileage. Time on Feet (TOF) builds the muscular and mental endurance ultra runners need, independent of pace. Apps that don't surface weekly hours prominently are missing the point.
2. Vertical Gain (Weekly and Per-Run)¶
A flat 60-mile week and a 60-mile week with 12,000 ft vertical are different sports. Track vertical, ramp it like you ramp mileage, and watch the ratio of gain to distance — that ft/mile number tells you whether you're prepping for a road 50K or a mountain 100.
3. Normalized Graded Pace or Effort Equivalents¶
Pure pace lies on hills. NGP (TrainingPeaks' Normalized Graded Pace, used to compute rTSS) and GAP (Strava's grade-adjusted pace) are different proprietary calculations — they're not interchangeable, and your TrainingPeaks numbers won't match your Strava numbers for the same run. Either is closer to truth than raw pace, and HR-based effort gets closer still. But even NGP has documented limitations on technical terrain — surface roughness isn't captured.
4. Heart Rate Drift and Decoupling¶
Aerobic decoupling on long runs (heart rate creeping up while pace stays flat) is a strong fitness signal for ultra runners. The standard threshold is 5%: anything above that warrants attention, and sustained drift well above 5% is a sign you're either undertrained for that duration or under-fueled.
5. ACWR (Acute:Chronic Workload Ratio)¶
Tracking ACWR is one of the cleanest single signals you have for injury risk during a high-volume ultra build. The 0.8–1.3 zone is the consensus "safe" range, with risk rising above 1.5. Treat this as a heuristic, not a verdict — but don't ignore it during big build weeks.
6. Long Run Quality, Not Just Quantity¶
In ultras, you're not holding pace — you're managing effort across changing terrain. The right question isn't "did pace fall off a cliff after hour 4," it's whether HR climbed unsustainably for the same effort, whether you bonked, and whether you were still running form-clean at hour 5. The second half of the long run is where the adaptation happens. If you can't analyze hour-by-hour HR and effort (not just pace), you're missing where the data lives.
7. Fueling Tracking — Often Ignored, Often Decisive¶
Your gut is the limiter past 50 miles. You can be perfectly trained and DNF at mile 60 because your stomach shut down. None of the major apps track fueling well — Strava ignores it, TrainingPeaks lets you log notes but doesn't analyze them, and NavRun's fueling support today lives mostly inside race-strategy generation rather than as a daily training metric. This is a real industry-wide gap. If you're racing past 50K, you'll be tracking calories per hour and fluid intake somewhere — likely a separate spreadsheet or PFH-style protocol — and that's worth knowing going in.
8. Cumulative Fatigue Across Back-to-Backs¶
A 3-hour Saturday plus a 2-hour Sunday is more valuable than a single 5-hour run for many ultra builds. Look at how Sunday's HR and pace compare to Saturday's at the same effort — that delta tells you whether you're adapting or just damaging.
9. Race-Specific Course Match¶
For target races with significant elevation (UTMB, Hardrock, Western States), training that matches the course profile beats training that just hits weekly hours. An app that knows your goal race elevation and helps you progress toward it is worth more than one that just tells you to "run more."
A Note for Marathoners Eyeing Their First Ultra¶
If you're a road marathoner thinking about a 50K, your stack question is different. Strava is fine for now. The question is when (or whether) to add a coaching layer. The biggest mistakes road runners make heading into a first ultra are: training to pace targets that don't apply on trail, ignoring vertical ramp, and underestimating time-on-feet volume. Whatever planning tool you choose for your first ultra, it should explicitly handle: longer time-on-feet (5+ hour long runs), elevation progression, and power-hike training as a deliberate skill. A marathon plan with longer Sundays is not an ultra plan.
How Most Experienced Ultra Runners Actually Stack These¶
Almost no serious ultra runner I know uses just one app. The most common stack I see:
- Strava for activity storage, social, and discovery
- A planning/coaching layer (TrainingPeaks if coached, NavRun if self-coached, sometimes Vert.run for trail-specific plans)
- Garmin Connect or COROS app for the rich biometric layer (HRV, sleep, recovery)
- Komoot or onX Backcountry for route planning on unfamiliar terrain
The mistake isn't using multiple apps. It's expecting one app to do all of it well. Strava isn't trying to be your coach; TrainingPeaks isn't trying to be your social network. If you understand each app's job, the stack works.
Decision Matrix: Pick by Use Case¶
| Your Situation | Primary App | Why |
|---|---|---|
| You have a coach | TrainingPeaks | Your coach almost certainly already lives here |
| You're self-coached, want ultra-aware AI | NavRun | Plans, analytics, and predictions tuned for ultras without manual interpretation |
| You're new to ultras and want to learn | Strava + free YouTube/blogs | Build your base, then layer in a planning tool |
| You only care about social and segments | Strava | The community layer is unmatched |
| You're a trail-first runner who loves data | Strava + Garmin Connect + planning layer | Stack the rich biometrics with structured plans |
| You're a coach with multiple athletes | TrainingPeaks | Coach view and athlete management remain best in class |
| You want race predictions that handle ultras | NavRun | Pace-extrapolation predictors don't work past the marathon |
Common Questions¶
Q: Do I need to pay for TrainingPeaks if I'm not coached?¶
Not really. The free tier is severely limited, and most of TrainingPeaks' value is in workout structure that benefits from a coach. Self-coached ultra runners often get more out of NavRun's free tier or Vert.run's trail-focused plans without the price tag.
Q: Can NavRun replace Strava?¶
No, and it doesn't try to. NavRun reads your Strava data and adds the analysis layer on top. You keep your activities, segments, kudos, and history on Strava.
Q: Why are race predictions so often wrong for ultras?¶
Most predictors use the Riegel formula, which assumes pace degrades at a fixed rate as distance grows. That holds reasonably well from 5K to marathon. Past 30 miles, elevation, terrain, nutrition, and pacing strategy dominate finishing time — not raw fitness. Predictors that ignore elevation gain are guessing.
Q: Is Strava's elevation gain accurate enough for ultra training?¶
Usually yes, with caveats. If your watch has a barometric altimeter, Strava's smoothing tends to under-count slightly but is close. GPS-only watches drift more. For ultra training, what matters is consistency: track ramp from your own baseline rather than comparing to absolute numbers.
Q: How do I know if my training plan is ultra-appropriate?¶
Three quick checks. First, does it talk about time on feet, not just miles? Second, does it include power hiking specifically, not just running? Third, does it ramp vertical gain alongside volume? If the plan reads like a marathon plan with "long" runs at 20 miles, it's a marathon plan in disguise.
Q: What metric is most predictive of finishing a 100-miler?¶
Total cumulative time-on-feet over the 8 weeks before the race, with consistent back-to-back long days. Mileage matters, but it's downstream. Time spent moving on terrain similar to the course is the closest thing to a single predictive metric.
Q: Do I really need ACWR alerts?¶
You don't need them, but they're cheap insurance. Ultra training has a high injury rate during the final build. A flag when your acute load jumps 50% above chronic is a useful nudge to take an unplanned rest day.
Q: Can I just use my Garmin or COROS app and skip everything else?¶
For activity recording and recovery metrics, yes. For structured ultra periodization, race predictions tuned to elevation, and weekly load analysis with plain-English summaries, no. The watch apps are great at "what just happened" and weak at "what should the next 16 weeks look like."
Conclusion¶
Key Takeaways:
- No single app is built end-to-end for ultras. Most experienced ultra runners stack 2–3 tools intentionally.
- Strava is the best activity storage and social layer. It is not a coaching tool.
- TrainingPeaks is the right home for coached athletes, but pace-based rTSS struggles on hills and the platform is overkill for casual self-coached use.
- NavRun is built for the self-coached ultra runner who wants ultra-aware analysis without operating TrainingPeaks.
- The metrics that actually matter for ultras — time on feet, vertical, decoupling, ACWR, course match — are mostly underweighted by pace-first apps.
The honest answer to "which app should I use?" is: pick the one that does the specific job you need, and stop expecting one app to do all of them.
See How NavRun Reads Your Strava Data¶
If you're curious whether NavRun fits your stack, connect your Strava account and see what it surfaces from your last 8 weeks of training. You'll see an AI training plan tuned to your goal race, analytics including ACWR and training load, and race predictions that account for elevation.
Your data stays on Strava either way.