Garmin Enduro 4 vs Enduro 3: What Actually Changed (And Who Should Upgrade)

Garmin just announced the Enduro 4, and it goes on sale October 9 for $899.99. If you were hoping for a big leap over the Enduro 3, I'll save you some reading: this is a refinement, not a reinvention.

That's not a knock on it. The Enduro line has one job, which is lasting longer than you do on an ultra, and it still does that job better than almost anything you can strap to your wrist. But if you already own an Enduro 3, the list of reasons to upgrade is shorter than you might expect.

Here's what actually changed, what quietly got cut, and who should buy one.

What Stayed the Same

Most of the hardware is a carryover from the Enduro 3:

• Same 51mm case, still one size only.
• Same 1.4-inch solar MIP display with a Power Sapphire lens. It's sunlight readable but not nearly as bright or colorful as the AMOLED screens on the Fenix 9 or Forerunner 970.
• Same battery life, up to 36 days in smartwatch mode and up to 90 days with solar.
• Same core sensors, including ECG, Pulse Ox, skin temperature, and multi-band GPS with SatIQ.
• Still a touchscreen plus buttons, and still 10 ATM water resistance.

It's actually 3 grams heavier, at 66 grams with the band, thanks to a new ComfortFit strap.

What's New in the Enduro 4

The upgrades are almost all storage and software, and most of them are aimed squarely at ultra runners.

Double the storage. The Enduro 4 jumps from 32GB to 64GB, with 50% more RAM. In practice, that means room for more downloaded maps and music, plus faster map panning. If you load up maps for multiple regions, this is a real quality-of-life upgrade.

An ultra race planner. This is the most interesting new feature for distance runners. You can plan your race around aid stations and see when you'll hit each one, which takes a lot of guesswork out of fueling and pacing a 50K or 100-miler.

Grade-adjusted pace workouts. Garmin can now build workouts around grade-adjusted pace, which accounts for hills. If you train on rolling terrain, hitting "pace" targets on uphills is basically impossible, so this makes structured trail workouts actually usable.

Stamina zones and stamina curve. These show how your endurance holds up over long efforts and how it's changing over time. It's the same feature Garmin added to the Fenix 9.

Rucking with pack weight. You can now enter how much your pack weighs, so effort and calorie estimates make sense for weighted hiking and rucking.

Garmin Epic. This groups multi-day activities into a single record, which is great for stage races, fastpacking trips, or anything that spans more than one day.

What Got Cut

This is the part most launch coverage skips. According to the5krunner's spec comparison, a handful of Enduro 3 features didn't carry over:

• Hands-free voice control
• Quick Workout
• YouTube Music support
• WhatsApp via Connect IQ

None of these are deal-breakers for most runners, but if you use any of them on your Enduro 3 today, that's a reason to hold off.

Why the Battery Numbers Look Different

If you compare spec sheets, the Enduro 4's GPS battery numbers look different from the Enduro 3's. That's mostly because Garmin renamed its battery modes, not because the battery changed. The Enduro 4's modes break down like this:

Solar figures assume a lot of strong sunlight, so treat them as best-case. Even without solar, 80 hours in normal GPS mode is enough for the vast majority of 100-mile races.

Who Should Upgrade?

If you own an Enduro 3: probably skip it. Your watch has the same screen, the same battery, and the same build. Unless the ultra race planner or 64GB of storage is a genuine game-changer for you, keep your money.

If you're on an Enduro 2 or older: it's worth a look. You'll get the jump in software, storage, sensors, and battery all at once, which adds up to a real upgrade.

If you're buying your first Enduro: compare prices first. The Enduro 4 is the better watch, but not by much. If you find the Enduro 3 at a solid discount now that its replacement is out, it's the smarter buy for most runners. If the price gap is small, get the Enduro 4 for the extra storage and newer software.

How It Stacks Up

The Enduro 4 isn't the only option if you need a watch that lasts. Here's how it compares head-to-head:

• Enduro 4 vs Enduro 3. The upgrade question in full detail.
• Enduro 4 vs Fenix 9 Pro Solar. Garmin's closest alternative, with wrist calls and a titanium case.
• Enduro 4 vs Fenix 9 Pro. Battery life versus a bright AMOLED screen.
• Enduro 4 vs Coros Vertix 2S. The other big name in ultra battery life, for $200 less.
• Enduro 4 vs Forerunner 970. If you're not sure you really need ultra-level battery life.

The Bottom Line

The Enduro 4 is the best ultra running watch Garmin has ever made, but it's only a little better than the Enduro 3. That makes the decision simple: if you don't own an Enduro yet, it's a great buy, especially if you train for ultras, stage races, or long days in the mountains. If you already own an Enduro 3, you're not missing much.

Still deciding? Our Watch Finder narrows down 79 watches in four quick questions, and our best running watches of 2026 ranking shows how the whole field stacks up.

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