I Raced a Half Marathon with the Garmin Fenix 9 Pro vs Garmin Forerunner 970 — Here’s Which One I’d Buy

Introduction: Putting Garmin's Best to the Test

The Garmin Fenix 9 Pro and Garmin Forerunner 970 sit at the very top of their respective lineups, cementing themselves as two of the absolute best sports watches available on the market today. While they are tailored to slightly different athletes—the Forerunner 970 functioning as a lightweight, slim profile watch built specifically for dedicated runners and triathletes, and the all-metal Fenix 9 Pro serving as an adventure-ready powerhouse with epic battery life, LTE, and satellite connectivity—they share a massive pool of high-end features.

Having worn the Garmin Forerunner 970 for over a year and strapping the Fenix 9 Pro to my wrist for a few weeks following its launch, I decided to put them through the ultimate real-world test: a head-to-head half marathon race. Here is my comprehensive comparison examining price, design, GPS and heart rate accuracy, battery life, and more.

Garmin Fenix 9 Pro vs Garmin Forerunner 970: Price

The Garmin Forerunner 970 has been available for over a year, meaning you can frequently find it discounted below its full retail price of $749. It keeps things delightfully straightforward by offering a single size and three distinct color options. Meanwhile, the Garmin Fenix 9 series features a much more sprawling and expensive lineup.

I tested the Garmin Fenix 9 Pro 51mm AMOLED equipped with inReach capabilities, retailing at $1,299. However, buyers can select from three different sizes and two display options within the Fenix 9 family. The standard Fenix 9 starts at $999, while the Pro variant starts at $1099, bringing an all-titanium case, satellite/LTE connectivity options, and a choice between AMOLED and Memory-in-Pixel (MIP) displays. Regardless of the configuration, the Fenix 9 series commands a substantially higher price tag than the Forerunner 970.

Design and Display Differences

Both smartwatches share several core design elements, including a durable sapphire crystal screen, a built-in flashlight, a five-button physical control layout, and Garmin’s advanced Elevate v5 heart rate sensors. However, the most immediate differentiator is size and weight.

The Forerunner 970 is noticeably slimmer and lighter than any Fenix model, particularly the bulky 51mm Fenix 9 Pro. The Fenix line does offer a 43mm variant that suits smaller wrists better than the 47mm Forerunner 970, but the Forerunner remains the lighter and more comfortable choice for daily long-distance training. Furthermore, the Forerunner 970 pairs a titanium bezel with a predominantly plastic body, whereas the Fenix 9 Pro features a luxurious all-titanium construction, giving it a high-end, versatile aesthetic suitable for formal or casual settings.

Water resistance also tilts in favor of the Fenix 9, which is diveproof down to 40 meters and features a 10 ATM rating, compared to the 5 ATM rating on the Forerunner 970. Additionally, the Fenix flashlight features a unique green light mode absent on the Forerunner.

GPS and Heart Rate Accuracy

Performance during my half marathon race was remarkably consistent across both devices. Checking the GPS tracks post-race revealed nearly identical lines that matched the officially measured 13.1094-mile championship course almost down to the exact meter.

Heart rate monitoring was equally impressive. When cross-referenced against data from a Garmin HRM 600 chest strap, both watches tracked heart rate fluctuations beat-for-beat throughout the race, save for a brief, minor erroneous spike experienced by the Fenix 9 Pro near the starting line. Across hundreds of miles of cumulative testing, both wearables have proven flawlessly reliable for athletic tracking.

Battery Life Comparison

Battery endurance is where the Fenix series pulls ahead, particularly with the massive 51mm Fenix 9 Pro. While my daily use of the Forerunner 970 with an always-on display yields about four to five days of battery life, the 51mm Fenix 9 Pro easily powers through 10 to 11 days under the exact same conditions. If you opt for the smaller 43mm Fenix 9, however, the Forerunner 970 will actually outlast it on a single charge.

Connectivity and Mapping Features

The inReach models of the Fenix 9 Pro introduce advanced LTE and satellite connectivity, allowing users to stay connected outside of cellular range—a game-changer for backcountry adventurers. Meanwhile, both watches feature Garmin’s industry-leading routable maps and navigation tools, though the Fenix 9 Pro boasts faster map rendering speeds and a fresh perspective view that tilts maps dynamically.

Final Verdict: Which One Should You Buy?

The Garmin Forerunner 970 remains my top sports watch recommendation overall. Its lightweight build, slim profile, and lower price point make it the ideal companion for dedicated runners. However, if you crave premium all-metal styling, superior battery life, or satellite communication for remote expeditions, the Garmin Fenix 9 Pro is worth every penny.