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Is The Garmin 305 The Right Running Tool For You?

garmin-forerunner-305The Garmin Forerunner 305 has many great features but are they the right ones to fit your running lifestyle and needs?

To add a bit of clarity to this question, I will highlight some of the main groovy and useful features that many runners may appreciate and also some of the unit’s limitations.

Groovy Features

  • 35 Data Fields – You can monitor a whole range of parameters such as calories, distance, elevation, heading, heart rate, heart rate avg, heart rate zone, laps, pace, pace avg, pace zone, speed, speed lap, speed max, stopwatch time, and many other variants of these fields. This should cover most anyone’s training or racing data desires.
  • Up to 12 Data Fields Viewable During Your Training/Race – The display screen is called a page. You can configure up to three pages of viewable data fields. Pages are easily rotated through using the up and down button on the Garmin. You can configure one to four data fields per page. Three pages with four data fields per page equals 12 data fields at your finger tips.

Personally I currently only use one page with four data fields (pace, heart rate, distance, and stopwatch time) for training but I did create another page that only has the time-of-day on it.

  • Alerts – Configurable Alerts based on time, distance, pace, and heart rate.

– When has 15 minutes passed?

– When has two miles passed?

– I want to run between eight and 10 minute miles.

– I want to run between 130 and 150 bpm.

Variations of all of these concepts can be setup with the Alert functionality.

  • Virtual Partner – Turn your run into a bit of a game while racing against/with the Virtual Partner. When using a Quick Workout or a pre-programmed Course, you can watch two little runners (you and the Virtual Partner) heading across your page (screen) while letting you know the distance ahead or behind the Virtual Partner.
  • Workout Flavors – Quick, Interval, and Advanced. If you like a little guidance during your workout, these can be helpful features.

Quick workout flavors include distance/time, time/pace, and distance/pace. As noted above you can use the optional Virtual Partner feature with these workouts.

Interval flavors include (dist run / rest time), (dist run / rest dist), (run time / rest time), and (run time / rest dist). You can also state the number of reps and include a warmup and cool down. Anywhere can be a track with this feature!

The Advanced workout feature allows you to create much more complex workouts that have varried distances, time, goals, etc within the same workout.

  • History – Of course the Garmin stores all of your workout data and you can view some of the data on the watch or look at all the goodies on your computer.
  • Heart Rate Monitor – Do you like to train with pace? Do you like to train with heart rate? Do you like to train with both? You can do it all with the Garmin Forerunner 305. I have been real happy with the heart rate monitor. Just add a bit of water to the chest sensors before putting it on and your are ready to go. It has been very stable for me.
  • Continuous Battery life – The specs say 10 hours of use before recharge is required but I ran a 50 mile trail run and the Garmin completed the race with me in a little over 12 hours. It did start beeping at me towards the end stating the battery was low or maybe I was just hallucinating at the time, not sure.

Limiting Features

  • Indoors Functionality – Since GPS is used to determine pace, speed, distance, and calories, the Garmin is not ideally suited for indoor use. GPS requires actually physical movement, a treadmill won’t cut it. Of course you can easily use the treadmill display for your workout. Also GPS does not go through structures (buildings, etc) very well or at all. The heart rate and timer functionality will still work though.
  • Water Resistance – The specs say you are safe for 30 minutes at one meter in depth. This may not be the best device to use in an adventure race or swimming some laps. I wouldn’t risk extended periods of time submerged in water with this device. Most runners shouldn’t have a problem with this.

As you can see the Garmin Forerunner 305 can do a lot but it does not shine nearly as bright indoors. Depending on your primary desired use, the limitations may or may not be a factor.

Now you have a pretty good idea of what the Garmin Forerunner 305 can and cannot do. Hopefully this helps in your search.

I have been using the 305 for nearly a year and have really enjoyed it. It is a fun and useful tool/toy. still has one of the best prices around unless you can find it on sale somewhere.

If you know of any other great running features or significant limitations runners should be aware of, please share in the comments section below.

Be active – Feel the buzz!

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About the author

David Hanenburg David Hanenburg is the passionate dirt-lovin' creator of Endurance Buzz and has been playing in the endurance sports world since 2000 after knockin' the dust off of his Trek 950 hardtail thanks to a friend asking to go ride some local dirt. In 2007 he ran his first ultra on the trails and fell in love with the sport and its people. For more information on David's endurance sports journey, check out the About page.

5 Responses to “Is The Garmin 305 The Right Running Tool For You?”

  1. on 24 Apr 2009 at 8:38 am marco

    hy everybody,

    the 305 is a great tool. that’s a statement.
    the only thing Garmin doesn’t say clear is that it is NOT water proof. I mean, the little four holes at the back. When your sweat go inside the 305 the buzzer sond decrease until disappear totally.
    so, the best things you can do is CLOSE de tiny holes with hard glue as soon as possible, better when you take it out of the box.
    Oterwise, after about six months you’ll loose the alarm and you have to open it and change the buzzer.
    Enjoy it, it’s a great tool and lately help me in training for the marathon of Rome.

    PS if you have to repair the buzzer this can be useful

    It is in french, but if I can write in english (I’m italian) you can read french, hahaha

  2. on 24 Apr 2009 at 8:36 pm David Hanenburg

    Hey Marco – I haven’t experienced or heard of this problem. Thanks for sharing!

  3. on 30 Oct 2009 at 2:26 am heart rate monitor

    This is probably the finest pure runners watch on the planet. You can train with a Virtual partner, accurately assess distance, minutes per mile, elevation, heart rate and many more variables. If you use this tool your times will improve – period.

  4. on 21 Jun 2010 at 11:08 am TroyH

    CAn I get the article on how to replace buzzer for FR305 sent to me in English. I can’t read French.

    Please send to email:

  5. on 23 Jun 2010 at 7:31 pm David Hanenburg

    Hey Troy – I personally don’t have the buzzer replacement article. You could try using an online language converter for the French article. Have you tried that yet?

    Good luck!