Choosing the right marathon watch can significantly enhance your training and race performance. In 2026, technology has advanced to provide more accurate heart rate and VO2 max tracking. Here are the top 5 marathon watches for serious runners this year.

1. Garmin Forerunner 965

The Garmin Forerunner 965 combines advanced health metrics with a sleek design. It offers precise heart rate monitoring through its Elevate wrist-based sensor and provides detailed VO2 max estimates. The watch also features GPS accuracy, long battery life, and tailored marathon training programs.

2. Coros Apex Pro

The Coros Apex Pro is known for its durability and high-performance features. It includes a heart rate monitor with advanced optical sensors and provides real-time VO2 max data. Its multi-sport tracking and long battery life make it ideal for marathon training and racing.

3. Polar Vantage V2

The Polar Vantage V2 offers comprehensive health and performance metrics. Its heart rate tracking is highly accurate, and it provides VO2 max estimates based on your running data. The watch also includes recovery insights and GPS navigation, supporting optimal training plans.

4. Suunto 9 Peak Pro

The Suunto 9 Peak Pro features robust build quality and precise sensors. It monitors heart rate continuously and offers VO2 max estimations to help runners optimize their effort levels. Its extensive battery life and offline mapping are added benefits for marathon runners.

5. Apple Watch Ultra 2

The Apple Watch Ultra 2 integrates seamlessly with iOS devices and provides accurate heart rate monitoring. Its advanced sensors also deliver VO2 max data, along with features like ECG and fall detection. The watch's lightweight design and customizable watch faces appeal to many runners.

Conclusion

Selecting the right marathon watch depends on your specific needs and preferences. The models listed above are among the best in 2026 for heart rate and VO2 max tracking, helping you train smarter and race better.