Garmin Fenix 8 Review: Overkill for Most, Essential for Some
The Garmin Fenix 8 is the most capable GPS sports watch ever made. If you don't know why you'd need one, you probably don't. But if you do know — here's everything.
I ran a 50-mile ultramarathon last fall wearing the Garmin Fenix 8. It tracked every elevation change, every split, my heart rate through the night section, and my estimated finish time updated in real time. At mile 38, when I was questioning every life decision that led me to a mountain at 2 a.m., it showed me I was on pace for a personal best. I finished with 34% battery remaining.
The Battery Life Is a Real Differentiator
28 days in smartwatch mode. 57 hours in expedition GPS mode with full satellite tracking every second. Those aren't marketing claims — I've tested them and they're accurate within a few percentage points. For multi-day events or wilderness expeditions, no other watch category comes close.
Multi-Band GPS Accuracy
Garmin's multi-band GPS uses multiple satellite constellations simultaneously. In dense forest, under tree cover, in urban canyons between tall buildings — the Fenix 8 tracks your path accurately in conditions where single-band GPS watches lose their way. I've compared it against a dedicated GPS unit on trail runs, and the discrepancy is typically under 1%.
The Dive Computer
Yes, the Fenix 8 has a dive computer built in. I'm not a diver, so I can't speak to how it compares against dedicated dive computers. But the fact that it exists — alongside the running dynamics, the skiing mode, the paddle sport tracking, the golf course mapping — makes the price feel more reasonable when you start adding up the equipment it replaces.
