The Pixel Watch 3 is regarded as a fairly reliable device for long-distance running, but its strengths and limitations are nuanced and worth understanding in detail.
GPS Accuracy
The GPS accuracy of the Pixel Watch 3 is described as "just so-so" by some reviewers. While the optical heart rate sensor has seen significant algorithmic improvements resulting in accuracy considered industry-leading alongside Apple and Garmin, the GPS performance is often described as average rather than exceptional. For example, in mixed-terrain rides and runs, the GPS tracked routes close to the actual path but showed some quirks and offsets thought to be algorithmic rather than hardware-related. This can lead to minor inaccuracies in distance tracking during long runs, especially on trails or irregular routes. Compared to some advanced fitness watches with dual-frequency GPS, the Pixel Watch 3 may show slight positional errors, which may affect precise distance measurement and pace calculation for runners focusing on detailed metrics.
Heart Rate Tracking
The Pixel Watch 3 excels in heart rate monitoring for long-distance running. It offers continuous heart rate tracking (once per second throughout the day), which surpasses Apple's approach of less frequent measurements outside workout mode. Reviews note that the optical heart rate sensor's accuracy rivals that of dedicated chest straps in various demanding scenarios, including intervals, steep hill runs, and mixed terrain. This reliable heart rate data can support better pacing and training decisions for runners.
Battery Life
Battery life is another critical consideration for long-distance runners. The Pixel Watch 3 offers about 6 to 7 hours of active GPS tracking on a single charge, which is adequate for most marathon distances, but might be limiting for ultra-distance runs or those tracking very long sessions with GPS continuously enabled. For example, during a 75-minute run, battery use was observed to drop approximately 23%, suggesting roughly 5 hours of GPS usage in continuous workout conditions. Outside GPS use, the watch can last over 36 hours, sometimes reaching 48 hours in lighter use. The watch supports relatively fast charging, reaching 50% charge in about 28 minutes, which helps manage battery life for frequent runners.
Running Features and Metrics
The watch offers personalized running workouts and coaching guidance through its Google Plan feature, which includes tempo runs, intervals, and other training types tailored to improve performance gradually. However, some users have found the interval training implementation to be challenging, with heart rate zone targets that are very specific and sometimes difficult to follow in outdoor running contexts. GPS lag in interval workouts has been reported, where the watch takes longer to register changes in pace and heart rate, potentially causing inconvenience during structured speed sessions.
The Pixel Watch 3 focuses on core running metrics but has more limited customizable data fields compared to more specialized running watches like Garmin. Despite this, it remains suitable for most runners who want a good balance between smartwatch functionality and running support. It also supports easy switching of playback tracks during runs, which some users find helpful for maintaining motivation and pace.
Overall Suitability for Long-Distance Running
Reviews from the running community suggest that while the Pixel Watch 3 is a strong everyday smart wearable with fitness tracking features, it is not a dedicated running watch. It performs well for heart rate accuracy and basic GPS tracking but lacks some advanced GPS precision and detailed running metrics preferred by serious or professional runners. Its battery life, while decent, might require mid-run charging or careful management for ultramarathons or very long runs.
Many runners appreciate its seamless Android integration, health tracking capabilities, and smartwatch features, making it a practical choice for casual to semi-serious runners who value wide functionality in one device. Those needing more nuanced training analytics, ultra-precise GPS, and ultra-long battery life for long-distance trail running might lean towards more specialized devices but could still use the Pixel Watch 3 in conjunction with other gear.
Summary of Key Points
- The Pixel Watch 3's optical heart rate sensor is highly accurate and suitable for detailed training monitoring in long-distance running.
- GPS accuracy is decent but not industry-leading, with occasional position offsets impacting some runners' distance and pace precision.
- Battery life supports typical marathon-length runs but might be limiting for ultra-distance or very long training sessions.
- Personalized running coaching and training plans are helpful but less flexible or advanced compared to dedicated running watches.
- Best suited for Android users who want a hybrid smartwatch with robust fitness tracking rather than a specialized running computer.
- Generally reliable for long-distance running but with some limitations on GPS precision and battery endurance for extreme endurance activities.