Garmin Forerunner 305 and 405

Garmin Forerunner 305 and 405 are watch style GPS-enabled training devices that have become quite popular with runners, both amateur and professional, and also professional athletes.

Below are some of the functions that have made these devices popular with consumers looking for personal fitness devices.

Your Trusted Training Partner

Garmin Forerunner 305 and 405 can function as serious training devices by providing you with access to useful data like – your location, distance covered, the speed at which you are running, calories burned and your heart rate data (when paired with a heart rate monitor).

Each run is stored in the memory, so you can review and analyze the data to see how your fitness is increasing with each run.

GPS Function

The Garmin Forerunner 305 is not meant to be used as full-fledged GPS navigation device. However, the device offers sufficient mapping, waypoint marking and routing capabilities which are very helpful for serious runners.

The device has a ‘zoom in or out’ feature that displays your current direction and path on a simple map.

It has a convenient “go to location” feature that routes you back to your starting location, or to any location that you have defined. This is a good feature for those who are somewhat geographically challenged.

The Garmin Forerunner lets you save routes, allowing you to select from the saved routes for your next run.

Virtual Partner

Garmin Forerunners 305’s Virtual Partner function allows you to set up virtual running or biking companions that compete against you. Great feature for those who need competition in order to bring the best out of them.


Forerunner 305’s courses feature lets you compete against your own previous workouts – you can compare your pace and heart rate to your past performance over the same run.

Data Recording & Management Functions

Garmin Forerunner 304 has impressive data screens that provide real-time information about all aspects of your workout – Calories burned, distance travelled, elevation, grade, track heartrate, lap heartrate, average heartrate, and lots more.


You can customize any of Forerunner 305’s three main data screens to give you instant feedback on your workout. Each workout is stored in memory so you can review and analyze the data and see how you’ve improved over time.

In case you want small Size

One common point that some people mentioned about Garmin 305 was its large size. They wanted Garmin 305 to be smaller, sleeker and comfotable enough to be worn all day long.

Garmin has made this wish come true by coming out with Garmin Forerunner 405, which looks like any normal sports watch while offering the functionality of Garmin Forerunner 305.

Major changes in Garmin Forerunner 405 are the following:-

  • Touch Bezel – This is ring around the watch that lets you change screens by tapping on it, instead of using buttons
  • Automatic sync – Garmin Forerunner 405 supports Wireless technology that automatically transfers data to your computer when the
    Forerunner is in range
  • Wireless Data Sharing – With Garmin Forerunner 405 you can share your locations, advanced workouts and courses wirelessly with other Forerunner 405 users.

Which one to go for.

Garmin 305 is the device to go for. It been around for long time and has been well tested by the users. Users review for Garmin 305 have all been good.

In case you are worried about the size you can go for Garmin Forerunner 405. However, you need to understand the following.

  • Smaller display – You will be seeing a smaller display on Garmin 405, compared to Forerunner 305
  • Bezel Touch – At the point of writing this post, the bezel touch has been reported to be a bit tempermental in wet weather conditions
  • Two Colors – Garmin Forerunner 405 is available in two colors  – black or green