Galaxy Watch Ultra 2 Trail Running Test: Can It Outrun Your Garmin?

Samsung Pushes Deeper Into Garmin's Lane

With the Galaxy Watch Ultra 2, Samsung is no longer just adding fitness features to a smartwatch. The company is openly courting trail runners, recreational divers, and other outdoor athletes who have historically defaulted to Garmin, COROS, or Polar. Native trail running, offline navigation, live elevation profiles, and ruggedized hardware mark a deliberate expansion into a category where Samsung has had little credibility. The reviewer framed the test as a head-to-head of sorts, asking whether the Ultra 2 can do the work of a purpose-built sports watch on a real trail rather than a treadmill.

That positioning matters because the dedicated sports watch market is profitable, growing, and loyal. Garmin's fēnix, Enduro, and Instinct lines have built reputations on multi-day battery life, barometric altimeter accuracy, and turn-by-turn routing that just works. Samsung's pitch is convenience: a watch that also handles notifications, payments, and apps, without forcing athletes to strap on a second device. If even a portion of casual trail runners migrate, it could reshape a corner of the wearables market that has been unusually resistant to mainstream smartwatches.

The Route Discovery Problem and the Display Win

The most awkward moment in the test came before the run even started. Samsung advertises the ability to browse nearby trails directly from the watch, but the route finder punted the job to the Samsung Health phone app and the on-watch search returned an empty map, even in trail-rich California. The reviewer had to fall back on a preloaded GPX file from a prior run, a workaround that the article notes most users will not have. The disjointed onboarding undercuts one of the feature's main selling points and exposes a software gap Samsung needs to close before this can credibly replace a Garmin or COROS for off-grid use.

Once the route was loaded, however, the hardware impressed. The 5,000-nit display held up under direct noon sun without the user needing to cup a hand over the screen, and turn-by-turn voice prompts came through the watch's speaker loud enough to hear on a windy trail. Those are the moments that define whether an outdoor watch is genuinely usable, and on both counts the Ultra 2 delivered, suggesting Samsung's display and audio engineering is paying dividends in this category.

AI Hydration: A Clever Estimate, Not a Measurement

The hydration reminder feature leans on AI to estimate sweat loss using heart rate, temperature, elevation gain, and workout duration, then buzzes the runner when it judges a drink is overdue. The reviewer, drenched in sweat after two climbs in 80-degree heat, called the timing reasonable, but the core limitation is honest: without a dedicated sweat sensor, the watch is making an educated inference, not reading actual fluid loss. For a casual runner in mild conditions that is fine. For a hard-charging ultra runner in a heat dome, the margin for error is exactly the kind of thing that matters.

The reviewer also called out a more fundamental constraint: battery. The Ultra 2 drained roughly 30% of its 800 mAh cell on a single 5-mile trail run with GPS, LTE, maximum brightness, and climb tracking enabled. Samsung increased capacity from 590 mAh on the original Ultra, but a demanding outdoor workout still cuts into the company's claimed 60 hours of normal use. For a multi-day backcountry run, that is the line where dedicated sports watches still pull away, and it remains the most credible reason a serious trail athlete might keep a Garmin on the wrist.