Garmin Wins 30-Mile Running Test

Garmin’s GPS proved most trustworthy after a 30-mile test with five smartwatches.

In a real-world burn test, a single journalist strapped five watches—Apple, Garmin, Samsung, Google, and Amazfit—and pushed them through roughly 30 miles of running to see which metrics actually hold up for distance, steps, and heart rate. The takeaway: no gadget is flawless, but one brand stood out for the core runner metric—distance tracking.

Across the long haul, Garmin led the pack on GPS reliability. Test readings showed Garmin’s distance and pace readings staying closest to the actual course, with far fewer drift incidents when the route threaded through city canyons and open trails. Apple wasn’t far behind, delivering solid heart-rate data and dependable daily-use metrics, which makes it a compelling all-around choice for runners who want a single wearable for workouts and daily life. Samsung and Google watches performed respectably for casual runs and everyday health tracking, but the GPS drift that crops up on longer routes made them less consistent on the 30-mile test. Amazfit offered competitive entry-level pricing and generally solid basics, yet the consistency gaps during the longer mile-marches were noticeable enough to affect trust on a true distance readout.

Setting up factors into the verdict. Apple and Google watches lean on tight phone ecosystems, so you’ll get the best results when paired with their respective platforms; Garmin’s ecosystem is famously granular—great for serious runners who want to export routes and analyze pace across miles but can feel fiddly for a casual user. Amazfit sits as the value option, with straightforward syncing via the Zepp app but with more variation in GPS performance on longer routes. Importantly, none of the five required a mandatory subscription to access core running metrics, though some brands offer opt-in services (for example, Apple Fitness+ and certain Garmin/third-party features) that add ongoing costs if you want advanced coaching or deeper analytics.

From a consumer standpoint, setup time matters more than you’d expect. Garmin often demands creating an account and navigating a more feature-rich app, which can slow you down at first but pays off with deeper data later. Apple and Google watchers are quicker to onboard but can be more opinionated about how data lives in their health ecosystems. Battery life remains a trade-off: the more GPS-centric a watch is, the more you’ll feel the drain on longer runs, with Garmin typically winning on endurance and Apple staying competitive for daily wear while offering robust health-tracking features in a familiar package.

Two practitioner takeaways for buyers. First, if you run long distances where every meter counts, Garmin provides the most trustworthy GPS data on long routes, making it the most reliable choice for runners who prize metric fidelity over feature parity. Second, if you want a single device that doubles as smartwear for daily life and HR tracking, Apple Watch offers the strongest overall package, even if its GPS isn’t quite as pin-perfect as Garmin’s on a marathon-length course. For those on a tighter budget or who value a simple, no-fuss setup, Amazfit can be enticing, but be prepared for occasional GPS quirks that can nudge your distance readings off course over dozens of miles.

Verdict: Buy Garmin if precision matters most for running metrics. Buy Apple Watch if you want a broad, well-integrated smartwatch experience with solid health data. Samsung and Google are fine for casual runners and everyday wear; Amazfit is best for entry-level buyers who value price over the last mile of GPS accuracy.