For marathon runners, a reliable running watch is more than a timekeeper—it’s a performance partner. Whether you’re training for your first 26.2 miles or chasing a new personal best, the right GPS watch can help you monitor pace, measure distance, track heart rate, and optimize recovery.

Why Do Marathon Runners Need a GPS Watch?

Unlike casual joggers, marathoners train with a purpose—every second and every mile counts. A GPS running watch provides:

• Accurate Distance Tracking – essential for long runs and race-day pacing.
• Heart Rate Monitoring – to stay in the right training zone.
• Pace Alerts – prevent starting too fast or slowing down mid-race.
• Training Insights – like VO₂ max, cadence, and recovery time.
• Battery Life – long enough to last a full marathon (and beyond).

👉 Investing in a good watch is like hiring a coach that’s always on your wrist.

Top Watches for Marathon Runners in 2025

Here are the best GPS watches marathoners trust for training and racing:

1. Garmin Forerunner 965 – The Marathoner’s Favorite

• Lightweight with a bright AMOLED display.
• Excellent GPS accuracy and advanced running dynamics.
• Battery life: up to 23 days in smartwatch mode / 31 hours in GPS mode.
  ✅ Best for serious marathoners who want performance insights.

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2. Coros Pace 3 – Best Value for Runners

• Affordable yet packed with advanced features.
• Ultra-lightweight with accurate GPS.
• Battery life: up to 38 hours in GPS mode.
  ✅ Perfect for beginners and budget-conscious marathoners.

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3. Garmin Forerunner 265 – Great Mid-Range Pick

• Bright AMOLED screen with excellent training tools.
• Tracks heart rate, VO₂ max, and suggested workouts.
• Battery life: up to 20 hours in GPS mode.
  ✅ A balance between affordability and pro-level data.

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4. Apple Watch Ultra 2 – For Lifestyle + Fitness

• Premium smartwatch with fitness focus.
• Dual-frequency GPS for high accuracy.
• Battery life: 36 hours (72 in low-power mode).
  ✅ Best for runners who also want smartwatch features (music, calls, apps).

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5. Polar Pacer Pro – Built for Endurance Athletes

• Lightweight with performance tracking.
• Excellent running metrics like cadence, stride length, and power.
• Battery life: up to 35 hours in GPS mode.
  ✅ Great for data-driven marathon runners.

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Key Features to Look for in a Marathon Running Watch

When buying a watch for marathon training, consider these must-have features:

1. Battery Life – should last at least 8–12 hours in GPS mode.
2. GPS Accuracy – for precise distance and pace tracking.
3. Heart Rate Monitoring – wrist-based or chest strap compatibility.
4. Lightweight Design – comfort matters over long distances.
5. Training Insights – recovery tracking, VO₂ max, cadence analysis.
6. Smart Features – music storage, notifications, route navigation (optional).