Best Running Watches for Marathons 2026: 6 Picks for Training & Race Day
A marathon does not require the most expensive running watch. What matters more is whether you can read your pace quickly, follow workouts without fuss, trust the GPS on the routes you run and finish race day with plenty of battery left.
That makes this list different from a general running-watch ranking. Maps are useful, but they are not a requirement for a marked road marathon. Multi-band GPS can matter more if you train or race in a dense city. A light watch may matter more than either of those after three hours on your wrist.
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Garmin Forerunner 570
The 570 gives marathon runners multi-band GPS, PacePro, structured workouts and Garmin’s newer race tools without making you pay for the 970’s maps and premium case materials.
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Compare the 6 marathon watches
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Garmin Forerunner 570
Multi-band GPS · PacePro · structured training · 42/47 mm.
Garmin Forerunner 170
43 mm · Garmin training · 20 hr GPS-only · optional music.
Garmin Forerunner 970
Maps · multi-band GPS · 26 hr GPS-only · sapphire.
Apple Watch Ultra 3
49 mm · precision dual-frequency GPS · strong smartwatch tools.
Suunto Race 2
Offline maps · dual-band GPS · 55 hr Performance mode.
What matters most for a marathon watch
Late in a marathon, simple lap pace and average pace screens are more useful than having dozens of metrics available.
Do not buy a watch whose manufacturer maximum barely covers your expected finish time. Music, navigation, screen settings and cold weather can reduce battery life.
Multi-band GPS matters more in dense cities, heavy tree cover and difficult signal areas. Open-road runners can often save money.
Tempo runs, intervals and marathon-pace blocks are easier when the workout is already on your wrist.
Case size and weight matter more on a long run than they do in a store. A smaller watch is often easier to sleep in too.
The 6 Best Running Watches for Marathons in 2026
Garmin Forerunner 570
Good choice if: marathon training is a major goal and you want Garmin’s stronger GPS, race tools and multisport features without paying for maps.
Check Current PriceThe 570 earns the top spot here because its extra features line up well with marathon training. Multi-band GPS is useful on difficult city routes, PacePro can help with race pacing, and Garmin’s auto-lap-by-timing-gates feature can trigger laps at course timing points when you are following a compatible loaded race course.
It also comes in 42 and 47 mm cases. That matters if you want advanced Garmin features without wearing a large watch through every long run and overnight recovery check.
COROS PACE 4
Good choice if: you want a very light running watch, lots of battery and marathon pacing tools without paying for smartwatch extras.
Check Current PricePACE 4 is easy to recommend for marathon training because its strengths are practical. It is light, the battery is generous and COROS includes race prediction, personal marathon plans and Virtual Pacer.
The tradeoff is the ecosystem. Garmin gives you more connected features and watch choices. COROS keeps the focus closer to training.
Garmin Forerunner 170
Good choice if: this is your first marathon and you mostly train on normal roads, parks and suburban routes.
Check Current PriceThe 170 covers the things most first-time marathoners need without making the watch complicated. Garmin’s training and recovery tools are here, Garmin Pay is included and the Music version can store audio for phone-free runs.
The reason to spend more is GPS. If your training or goal race runs through a dense downtown core or other difficult signal area, the 570’s multi-band GPS is a more useful upgrade than maps.
Garmin Forerunner 970
Good choice if: your marathon watch also needs to handle travel, unfamiliar routes, trails and premium Garmin training features.
Check Current PriceThe 970 is the more complete watch, but that does not automatically make it the better marathon buy. A marked road race rarely requires maps.
It makes more sense if you travel for races, train in unfamiliar places or want one premium Garmin for road and trail use. You also get sapphire glass, a titanium bezel and a built-in flashlight.
Apple Watch Ultra 3
Good choice if: you want one premium iPhone watch for training, calls, music, safety features and daily life.
Check Current PriceUltra 3 can easily be a marathon watch. Apple gives it precision dual-frequency GPS and enough workout battery for marathon training and race day with a large buffer for most runners.
The reason to choose it is the smartwatch side. If you want calls, messages, music, safety tools and the Apple ecosystem on the same device, it makes sense. If the watch is being purchased mainly for running, Garmin and COROS are easier to justify.
Suunto Race 2
Good choice if: your marathon training overlaps with trails, travel and unfamiliar routes and you want a non-Garmin option.
Check Current PriceRace 2 is more watch than a simple road marathon requires, but its combination of offline maps, dual-band GPS and long Performance-mode battery makes sense for runners who do more than road racing.
The biggest thing to check is fit. The 49 mm case is large, and comfort matters on long runs and overnight recovery tracking.
Older Garmin models that can still make sense
Current entry Garmin. Good for a first marathon if the 170’s extra features do not matter.
Check price →Still a capable marathon watch when it is clearly cheaper than the newer 170.
Check price →Still attractive on sale because it already has multi-band GPS, music and multisport support.
Check price →Set up your watch before marathon morning
- Charge it fully. Start with a full battery even if your watch normally lasts for days.
- Use a simple race screen. Time, lap pace or average pace, distance and heart rate are enough for most runners.
- Test your GPS mode on long runs. Do not change to multi-band, SatIQ or Low Power Mode for the first time on race day.
- Set PacePro, Virtual Pacer or your target before the race. Do this while you are calm enough to check it properly.
- Remember that course markers define the race distance. GPS can read long because of signal error, corners and weaving through other runners.
- Do not debut new alerts or data screens on race day. Your last long run should use the same setup.
