Garmin Forerunner 35 Review: A Solid GPS Running Watch for Beginners

Quick Verdict

The Garmin Forerunner 35 has been on my wrist for about six weeks now — through early morning 5Ks in humid air, a couple of tempo runs, and daily life in between. The GPS lock is fast and consistent, heart rate tracking holds up well for most runs, and the battery genuinely lasts a week. It's not flashy, and it won't replace a Fenix for ultramarathoners, but as an entry-level GPS running watch it earns its place. I'd score it 4.2 out of 5 — a honest recommendation for runners who want reliable data without the complexity or cost of flagship models.

What Is the Garmin Forerunner 35?

The Garmin Forerunner 35 is a GPS running watch designed for beginners and intermediate runners who want basic but accurate tracking without a steep learning curve. Released as part of Garmin's entry-level line, it sits below the Forerunner 45 and well below the Fenix series, but it punches above its weight in core functionality. The watch uses GPS and GLONASS satellites to track your runs, pairs with Garmin's free Connect platform for data analysis, and includes wrist-based heart rate monitoring via Garmin's Elevate sensor.

Physically, it's a lightweight (about 42g with strap) black-or-white resin watch with a 1.3-inch monochrome display. The screen is readable in direct sunlight, which matters more than you'd think when you're squinting at pace data mid-run. It charges via a proprietary cradle — a minor annoyance if you lose the cable — and pairs with both Android and iOS devices through Bluetooth.

Key Features

• GPS + GLONASS tracking for accurate distance and pace
• Garmin Elevate optical heart rate sensor (wrist-based, all-day monitoring)
• All-day activity tracking: steps, calories, intensity minutes
• Smart notifications from your paired smartphone
• Automatic data uploads to Garmin Connect
• LiveTrack so friends can follow your run in real time
• Music controls when connected to your phone
• Basic swimming profile (pool swimming only)
• Move IQ auto-detection of activities
• Week-long battery life in watch mode

Hands-On Review

I strapped the Forerunner 35 on the morning it arrived and took it out for a 6-mile loop through my neighbourhood — a mix of suburban streets, one stretch under heavy tree cover, and a finish near a parking structure where GPS can get sketchy. Within 20 seconds of stepping outside, the watch had locked on. By mile two, the pace was within 3 seconds per mile of my phone's GPS trace. That kind of consistency kept me trusting it.

What surprised me was the heart rate data. I'd expected the optical sensor to lag — it usually does on cheaper watches — but for my usual easy runs at 145-155 bpm, the numbers tracked closely with what I'd seen on a friend's chest strap. The gap widened noticeably during a threshold session with sharp surges, where the watch lagged by a beat or two during transitions. For most people, that's fine. For race-pace interval work, you'll want a chest strap if precision matters to you.

Garmin Connect is genuinely where this watch gains value over time. After each run, data syncs automatically over Wi-Fi when I get home, and the app surfaces trends I'd otherwise miss — my resting heart rate has dropped 4 bpm over six weeks, and my average pace on easy runs is about 15 seconds per mile faster than month one. The community challenges are hit or miss, but the data visualisation is clean and the training load insights are simple enough to act on without a sports science degree. I spent a full evening digging into past runs and came away feeling like I actually understood my training load, which is more than I can say for some rival apps.

Daily wear was where I almost gave up on it. The monochrome display is functional but dated, and the notification system vibrates for every app ping — I turned off alerts from four apps within the first day. The backlight is bright enough, but tapping the screen to activate it during a run (when my fingers were sweaty) sometimes required two or three tries. The silicone strap got slightly uncomfortable after 12 hours straight in hot, humid weather, but switching to a softer third-party band from Amazon solved that for under $10.

Who Should Buy It?

• New runners building a habit — If you're starting a couch-to-5K programme or want to track your first race, the Forerunner 35 gives you the data you need without overwhelming you with options.
• Fitness beginners wanting all-day tracking — Steps, calories, heart rate, and move reminders cover the bases for anyone building a more active lifestyle.
• Runners on a budget who prioritise GPS accuracy — It undercuts most competitors at this price while matching or beating them on core run tracking.
• Garmin ecosystem fans upgrading from a basic tracker — If you want to dip into GPS running without leaving Garmin Connect behind, this is a logical step up.

Skip this if you want a colour touchscreen, onboard music storage, or advanced running dynamics like ground contact time and vertical oscillation. Also skip it if you're a serious competitive runner who needs race-specific features or precise heart rate data under maximum effort — spend the extra on a Forerunner 255 or a chest strap setup instead.

Alternatives Worth Considering

Garmin Forerunner 45 — If you want a slightly newer model with a colour screen and more sport profiles (including strength training), the Forerunner 45 is worth the modest price jump. The interface is more responsive and the safety features (incident detection, assistance) are genuinely useful.

Fitbit Charge 5 — If daily wellness features and stress tracking matter more than raw GPS precision, the Charge 5 offers a superior smartphone app and a brighter AMOLED screen. But its GPS relies on your phone, so it's less reliable for standalone runs.

Apple Watch SE — For iPhone users who want notifications, music, and a polished smart watch experience alongside running data, the Apple Watch SE is a compelling package. Just don't expect Garmin-level running metrics or battery life.

FAQ

Final Verdict

The Garmin Forerunner 35 is the kind of watch that grows on you. It's not the most feature-rich GPS running watch available, and the monochrome screen shows its age, but on the metrics that matter most — GPS accuracy, heart rate reliability for moderate runs, battery life, and data depth through Garmin Connect — it delivers consistently. For runners who want solid tracking without spending $400 on a Fenix, this is the practical choice. I'd buy it again, and I've already recommended it to two friends training for their first half-marathons.