I trekked the Cascade Mountains with the Apple Watch Ultra 3 vs Garmin Instinct 3 vs Samsung Galaxy Watch Ultra 2 — this is the one I'd take on my next hike

Close-up of the Samsung Galaxy Watch Ultra 2, Apple Watch Ultra 3 and Garmin Instinct 3 in nature — (Image credit: Dan Bracaglia/Tom's Guide)

I just got back from a trip to North Cascade National Park where I experienced the grandeur of jagged mountain peaks, dynamic waterfalls, cerulean rivers, and breathtaking glaciers. Of course, I logged each day of my adventure using a menagerie of the best smartwatches.

To kick things off, my partner and I hiked to Blue Lake, a seriously stunning alpine lake accessible via a well-maintained out-and-back trail. I’m in the process of reviewing the new Samsung Galaxy Watch Ultra 2, so this seemed like the perfect opportunity to test it against its direct competitor, the Apple Watch Ultra 3, and my current go-to smartwatch for adventure tracking, the Garmin Instinct 3.

With just two wrists of my own, I asked my partner to rock the Apple Watch Ultra 3 (worn on her left wrist), while I wore the Galaxy Watch Ultra 2 on my left wrist and the Garmin Instinct 3 on my right wrist before embarking on our Cascadian trek. I also ran Strava from my iPhone 16 Plus.

Apple Watch vs Galaxy Watch vs Garmin: hike data compared

Scenic photo of Blue Lake in the Cascade Mountains with swimmers, glaciers, and trees — (Image credit: Dan Bracaglia)

Three hours, five miles, roughly a thousand feet of climb, and one very chilly swim later, we returned to the car, where I carefully logged the results from each device. The outcome of the comparison was crystal clear; one wearable proved more capable and up to the task than the others. Read on to find out which.

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Header Cell - Column 0	Apple Watch Ultra 3	Samsung Galaxy Watch Ultra 2	Garmin Instinct 3	Strava
Distance	5.02 miles	4.97 miles	5.17 miles	5.26 miles
Workout time	3 hours 6 mins	3 hours 8 mins	3 hours 8 mins	3 hours 6 mins
Elevation gain	1,169 feet	1,700 feet	1,050 feet	878 feet
Average pace	37 mins 04 secs per mile	37 mins 43 secs per mile	36 mins 27 secs per mile	35 mins 21 secs per mile
Battery drain	18%	18%	6%	n/a

Here are three reasons why I’d choose the Garmin Instinct 3 over the Apple Watch Ultra 3 or Samsung Galaxy Watch Ultra 2 for my next hike.

1. Garmin's elevation data is the most accurate

The Samsung Galaxy Watch Ultra 2 was notably and concerningly waaaaay off, calculating almost double the elevation of Strava and AllTrails.

According to the Washington Trail Association, Blue Lake Trail involves an estimated 1,050 feet of elevation gain, which is coincidentally the same exact amount of climb logged by the Garmin Instinct 3.

AllTrails lists the climb at a more modest 920 feet. Either way, Garmin was the closest of the bunch at accurately logging my uphill efforts for this hike. The Apple Watch Ultra 3 turned in a slightly elevated (some pun intended) metric, which is pretty much par for the course for even the best Apple Watches in 2026 from my experience.

Meanwhile, the Samsung Galaxy Watch Ultra 2 was notably and concerningly waaaaay off, calculating almost double the elevation of Strava and AllTrails.

2. The Instinct 3 used way less battery

With a lengthy pause taken at the top of Blue Lake Trail for a swim and snack, our total trek time took just over three hours. In that period, both the Apple Watch Ultra 3 and Samsung Galaxy Watch Ultra 2 burned through 18% of battery, suggesting that around 15 hours of continuous trekking is likely the limit for both when it comes to GPS power consumption.

The Garmin Instinct 3, meanwhile, used only 6% of battery tracking my three-ish-hour trek, making it the obvious choice of the bunch for multi-day outdoor adventurers where access to a charger isn't guaranteed.

3. The Garmin is lighter and comfier

Close-up of the Garmin Instinct 3 showing the 'Torch' LED flashlight illuminated from the top of the watch case — (Image credit: Dan Bracaglia/Tom's Guide)

Finally, on my 6.5-inch wrist, the Garmin Instinct 3 in 45mm feels way comfier than the Apple Watch Ultra 3 or the Samsung Galaxy Watch Ultra 2. This is because it's both smaller and lighter. Including the straps used for the hike, the Instinct 3 weighs 53.5 g, compared to 95.4 g for th the Apple Watch Ultra 3, and 85.8 g for the Samsung Galaxy Watch Ultra 2

The Instinct 3's rounded case also wears more comfortably than the rectangular case design of the Apple Watch and Samsung. Moreover, the Instinct 3 isn't nearly as tall as either of its rivals, and is noticeably narrower than the Samsung, with a similar width to the Apple Watch.

Which of these three smartwatches would you pick to log an epic outdoor mountain adventure? Let me know in the poll below.

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Dan Bracaglia is the Tom’s Guide editorial lead for all things smartwatches, fitness trackers and outdoor gear. With 15 years of experience as a consumer technology journalist testing everything from Oura Rings to instant cameras, Dan is deeply passionate about helping readers save money and make informed purchasing decisions. In the past year alone, Dan has assessed major product releases from the likes of Apple, Garmin, Google, Samsung, Polar and many others.

An avid outdoor adventurer, Dan is based in the U.S. Pacific Northwest where he takes advantage of the beautiful surroundings every chance he gets. A lover of kayaking, hiking, swimming, biking, snowboarding and exploring, he also makes every effort to combine his day job with his passions. When not assessing the sleep tracking and heart rate accuracy of the latest tach gadgets, you can find him photographing Seattle’s vibrant underground music community.