A good running watch can provide valuable information while you run, as well as automating your training log. This article is a concise guide to the best running watches available today. It does not attempt to cover every watch on the market, but it does call out some to avoid.

1 Summary

This is a summary of my recommendations.

Watch	Recommendation Reason	With Heart Rate Monitor	Without Heart Rate Monitor	Accessory Heart Rate Monitor	Footpod
Garmin 310XT	The best value for nearly every runner.	Garmin 310XT with HRM	Garmin 310XT without HRM	Garmin HRM	Garmin Footpod
Garmin 610	Smaller than the other recommendations.	Garmin 610 with HRM	Garmin 610 without HRM	Garmin HRM	Garmin Footpod
Garmin 910XT	An improved version of the 310XT. Better for swimmers & adds an altimeter.	Garmin 910XT with HRM	Garmin 910XT without HRM	Garmin HRM	Garmin Footpod
Garmin 205	Limited functionality, but cheap	Not available	Garmin 205	N/A	N/A

1.1 What to look for

There are several features to consider when looking for a runners watch.

GPS provides an easy measure of how far you've run, which is critical for your training. While it is possible to map out a run afterwards, this tends to be tedious and is typically less accurate than GPS.
- GPS is easy to use and accurate enough for most running, but it is not accurate enough for things like interval training.
- The errors in GPS average out over a run, but they cause a problem when trying to display current pace.
A FootPod can be used to provide Cadence and in some watches it can also provide pace and distance. Unlike GPS, FootPods need to be calibrated to provide accurate pace/distance.
Heart Rate is important information when training, though it is important to understand the limitations of heart rate based training. Having a Heart Rate Monitor that will record your heart rate is particularly valuable for evaluating your training. The heart rate strap that goes across your chest can be intrusive and sometimes can chafe. Polar heart rate monitoring is far better than the Garmin equivalent.
The ability to record your workout and store it in a training log such as Dailymile or SportTracks is vital. All of the recommended watches here have that ability. I'd strongly advise even a new runner to store their data so that they can look back over the months and years to understand their progress.
An altimeter will measure the atmospheric pressure and give you altitude. This is more accurate than GPS, but will require calibration to adjust for weather related pressure changes.

1.2 Garmin Heart Rate Monitoring

The Heart Rate Monitoring of Garmin watches is not as reliable as the Polar systems, but there are things to can do to improve this.

2 The best value - Garmin 310XT

The best value watch for most runners is currently the Garmin 310XT with HRM. It is available as the 310XT 'Fitness Monitor' without the Heart Rate Monitor for $50 less. The Garmin 910XT is better, but not worth the extra cost for most runners.

Garmin 310XT

2.1 Pros

The 310XT is one of the most advanced watches available, but is no harder for a beginner to use than most alternatives. (It's easier than the 4xx series Garmin watches.)
The 310XT is great value for money at this price level.
A great feature is the ability to use the optional FootPod to display your current pace while using GPS for overall pace, distance and route. Only the 310XT, 910XT and Garmin 610 can do this.
The GPS is more accurate than earlier watches, and has a faster startup time. (It uses the SiRFstar III with Instafix, one of the latest GPS chipsets)
The housing is fully waterproof (to 50m/160ft), so running in the rain is no problem.
Connection to a PC is wireless, using a USB adapter. This is less hassle than any of the other options I've tried.
The display is big enough to show four readings. I often display current pace, average pace for the current lap, average pace for the run and either heart rate or distance.
You can upload courses and display them. This is great when running somewhere unfamiliar.
There are several optional extras for the 310XT, including the already mentioned FootPod and heart rate strap. For cyclists there is also a speed/cadence sensor and it works with various power sensors.
The vibration alert works nicely. I often run with the 310XT set to record a lap every mile, and it will vibrate as well as beep.

2.2 Cons

Some people find the 310XT to be rather large, and it is much larger than a normal watch.
The battery life is good for about 16-20 hours, which is enough for most people. Ultrarunners doing 100 mile or longer races will find this a problem, though it is possible to recharge it while in use.
For races where the GPS track is not important, you can extend the battery life by turning off the GPS receiver and use the FootPod. After 12 hours of running I still had 85% of the battery left. If you're running on a reasonable smooth surface, the FootPod is often more accurate than GPS.

3 The Best – Garmin 910XT

The Garmin 910XT with HRM is an improved version of the 310XT, but it's about $100 more expensive. It can record laps when swimming, and is better at recording altitude, and it's recommended if you need those features. If you don't need them, then the 310XT is better value. (It's available without the Heart Rate Monitor as Garmin 910XT without HRM.) Nearly all of the pros and cons of the 310XT apply to the 910XT, so I won't repeat them here.

Garmin 910XT

3.1 Pros

The 910XT can record swimming, but it does this with an accelerometer rather than GPS. You have to tell the 910XT how long the pool is, but it will detect each lap, as well as your stroke.
The 910XT has a barometric altimeter, which is far more accurate at recording altitude changes than GPS.

3.2 Cons

The biggest downside for most people is the price, which is $100 more than the 310XT.
While the 910XT is slightly slimmer than the 310XT, it is still rather large, and it is much larger than a normal watch.

4 Smaller – Garmin 610

The Garmin 610 with HRM is a new watch from Garmin that is smaller, but overcomes many of the issues seen in the 4xx range (see below).

Garmin 610

4.1 Pros

Smaller than the 310XT/305/205 and closer to the size of a traditional watch.
Like the 310XT, it can use the optional FootPod to display your current pace while using GPS for overall pace, distance and route. Only the 310XT, 910XT and 610 can do this (so far).
The touchscreen interface works with gloves and in the rain, unlike most touchscreens found on phones or media players.
Good GPS accuracy (uses the SiRF SiRFstarIV with the Instant Fix II)

4.2 Cons

The battery life is rather short. It is claimed to provide 8 hours, but based on experience with other Garmin devices, the actual live may be quite a bit less. This is likely to cause an issue for slower marathon runners or ultrarunners.
The price is quite high, listing at $350 or $400 including the heart rate monitor.
Not the range of accessories that the 910XT/310XT has, such as power meter for cycling.
No display of course maps.

5 Cheaper - Garmin 205

The Garmin 305 and the Garmin 205 are the predecessors to the 310XT and are quite similar in a number of ways. The 305 has a few extra features over the 205, such as the heart rate monitor and support for a FootPod. The 205 is quite cheap, but the 305 is now more expensive than the 310XT and nowhere near as good.

Garmin 305 with 205 on the right

5.1 Pros

The Garmin 205 is cheap.
Usability, display size and course display are similar to the 310XT.

5.2 Cons

The battery life is quite a bit shorter than the 310XT (6-10 hours), though still good enough for many runners.
The GPS is not as accurate or as fast as the 310XT.
They're not fully waterproof, but I never had a problem in the rain.
The 205 does not work as a Heart Rate Monitor, something I believe is important.

6 If you need Heart Rate Variability – Polar RS800CX

Polar RS800CX

I used Polar systems for many years and their quality is great. However, I find the convenience of the Garmin GPS systems to be superior and I would no longer recommend the Polar RS800CX unless you need a first rate [Heart Rate Monitor]] that will display Heart Rate Variability.

6.1 Pros

Heart rate monitoring is far better than with Garmin. The RS800CX will even record each individual heart beat for analyzing Heart Rate Variability, though few people will ever make use of that feature.
The battery life of the RS800CX is measured in months not hours. This should not be an issue for most runners.
The RS800CX is the size of a conventional watch, and because of the long battery life, it can be used as one.
Includes a barometer for altitude (GPS has very poor accuracy for altitude).
There is a Polar FootPod, the Polar S3+ Stride Sensor, which works nearly as well as the Garmin equivalent, but it's larger and more expensive.
Fully waterproof.

6.2 Cons

It's Expensive at around $370.
While the RS800CX can support GPS, it requires an add-on GPS box you strap to your arm, which is a rather poor solution. The GPS has a battery life of only 20 hours and requires recharging.
There is no display of course maps.
This is a Heart Rate Monitor and it objects if you try to use it without the monitor.

The rather clunky GPS and arm band

7 Not Recommended - Garmin 405/405CX/410

The Garmin 4xx series watches use a touch sensitive bezel which does not work well with gloves or when wet. The Garmin 410 has an 'improved bezel', but there are still problems. I also see more people struggling at the start of marathons with the 4xx watches than all the other devices combined.

8 Not Recommended - Nike+ Sportwatch

There is a lot to like about the Nike+ Sportwatch, but it has one weakness that I believe is unacceptable. The software for the Nike+ does not allow you to use the data from your runs in anything other than the Nike web site. A training log is important, and while beginners may not need one, buying a watch that prevents you from accessing your data in the future is too limiting. If you're still interested, have a read of DC Rainmaker's review.

Best Running Watch