Garmin Fenix 9 Pro Solar Watch Tested for Trail Runners
A reviewer tested the Garmin Fenix 9 Pro Solar for 180 miles over three weeks, charging it only once. The watch features a solar-charging ring, a memory-in-pixel display for readability, and built-in inReach satellite safety features.
The Garmin Fenix 9 Pro Solar watch lasted for three weeks and 180 miles of testing on a single charge. According to a review from Runner's World, the device is aimed at trail runners, multisport athletes, and ultra runners seeking exceptional battery life, integrated safety tools, and a highly readable screen.
A memory-in-pixel display and a solar-charging ring are central to its performance. The MiP screen offers clear visibility in all lighting conditions, from bright sun to dim interiors. The solar ring around the titanium bezel significantly extends battery life, even in cloudy weather, making frequent charging unnecessary during normal training.
inReach Satellite Safety Features
The built-in inReach satellite connectivity provides critical safety functions without needing a paired phone. These features include an SOS signal, two-way messaging, and LiveTrack for followers, all routed through Garmin's 24/7 Response Center. For trail runners often outside cell service range, this system offers a significant safety net.
Advanced Trail and Health Metrics
For trail running, the watch includes ClimbPro, which segments climbs and displays real-time data on grade, pace, distance, and ascent. This is paired with TopoActive offline maps. A feature called Epic groups multi-day training blocks into a single view for analyzing total volume and bodily response.
Health monitoring is extensive. The reviewer highlighted the ECG app and Pulse Ox sensor as particularly valuable, alongside stress tracking, Body Battery, and sleep metrics. The ECG function allows for on-wrist readings that can be sent directly to a doctor.
Additional Features and Drawbacks
The watch includes substantial storage for music and new voice control activated by saying "OK Garmin." A built-in LED flashlight offers white, red, or green light with adjustable intensity. New workout modes include a Quick Workout generator and native tracking for mixed-session activities like rucking and rowing, though the reviewer found the Hyrox tracking still requires third-party apps for accuracy.
The review noted a noticeable lag, estimated between half a second and a full second, when starting or stopping a run or switching exercises in triathlon mode. Runner's World's Jeff Dengate confirmed the delay, calling it "super annoying" and noting the previous Fenix 8 model felt more immediate.
While the solar battery, MiP display, and inReach features justify its price for the target user, the reviewer stated that other models in the Fenix 9 line would suffice for those who do not require those specific functions.
