Hiking off leash with your dog is great fun, but having a way to know where he is at all times makes it even more fun! There are several products out there that allow you to track your dog–and the Garmin Astro is my favorite.

Why The Garmin Astro?

There are a few other tracking devices for dogs, but the Garmin Astro gives the best tracking coverage. Many systems require cell service–which can be really spotty. The Astro uses GPS satellites, and the latest (Garmin Astro 430) uses both GPS and GLONASS reception for better satellite tracking in challenging environments.


Garmin Astro 430

This gives you all the advantages of having a GPS to help guide you on your hikes and keep you from getting lost, with the added advantage of being able to keep track of your dog as well!

Several Versions Of The Garmin Astro

There are several versions of the Garmin Astro, the latest being the Astro 430. Each version has significant improvements, but don’t despair! Your older version, if you have one, is still awesome. And the newer collars will work with some of the older versions. I have an Astro 220 (there has since been a 320 and the 430). When I adopted another dog and needed another collar I was worried that I wouldn’t find one that would work with my handheld. But luckily, some of newer collars work with the older versions of the handheld device, or you can find the older versions of the collar on eBay.

Each version really does have significant improvements, but they are pricey–so I’m not upgrading until I need to. I’ve been using the same unit for almost 12 years, and it has held up really well. I use it nearly every day–so that is a lot of use! And I drop it, sit on it, put it in and out of my pocket constantly. It just keeps truckin’ along.

Water resistant? You bet!

I have never had a collar wear out or malfunction, either. And my dogs put them to quite the test! Through brush, into holes they dig, into water while swimming–they aren’t easy on them!



Tracking Is Great!

The tracking with the Garmin Astro is great! As I said, the newest, Garmin Astro 430 can track up to 20 dogs at a time (good grief!). It gives you an update where they are every 2.5 seconds. It has a range of about 9 miles, although, as it is line of sight, it gets interrupted if the dog goes over a large hill, or is burrowed into a hole.

You can look at the main screen and see a compass arrow pointing in the dog’s direction, and a readout of how far away he is from you. If you toggle to the map screen, you can see where you and the dog are on the map, and a line showing the route you took.

The readout also features a little icon, showing you if the dog is running, on point, has treed, or is sitting or lying.

If you are with friends, or do search and rescue work, the newer units

can be set up to communicate, so you can see where the dogs are on separate handheld units. So if you are separated, you can still check on all the dogs. You can set it up so search base personnel can see where the dogs are searching while you are still in the field.

But My Dog Is Small, Can He Use An Astro Garmin?

Garmin has luckily come out with the T5mini collar for smaller dogs. It is only 7 ounces, as opposed to the 9.2 ounces of the regular T5 collar. It fits dogs with a 9.5″ neck size. So it won’t work for your chihuahua I’m afraid, but it will work for many small dogs.

Are The Maps Included?

Yes! The newer Garmin Astro 430 comes with preloaded TOPO US 100K mapping, plus a free 1-year BirdsEye Satellite Imagery subscription. This is a great improvement! I had to buy the maps separately.

It also has a micro SD card slot to load other map options (sold separately). One of these is a turn by turn driving selection, so you can use the same handheld as a driving GPS system.

What About The Batteries?

The handheld unit works with AA batteries, or with a rechargeable battery. The dog collars are rechargeable, and come with the charging unit and a vehicle charging adapter.

The battery life is very good. For the handheld unit, Garmin states it is up to 15 hours. For the collars, it is up to 20 or more hours! I’ve never actually checked these numbers provided by Garmin, but I know the batteries on both the handheld and collars need replacing/recharging infrequently, so I think they are pretty accurate.

What Other Cool Features?

The collars are water resistant up to 10 meters underwater. My dogs have frequently checked out how water resistant the collars are, and I’m happy to say it has never been an issue.

There is an LED light on the newer collars that can be turned on with the handheld so you can see your pooch up to 100 yards away in the dark.

The 430 is bright orange, so you can find it easily if dropped. My 220 is black and gray, and I can vouch for it being hard to find if I put it down or drop it!  Luckily my Search and Rescue dog is trained to find articles with human scent on them, so he finds it for me!

The workmanship is great, so both the handheld unit and the collars hold up very well to rough use.

Do I Recommend The Garmin Astro Dog Tracking System–YES!

I can’t imagine hiking with my dogs without the Astro tracking collar! It gives me great piece of mind, as I know where my dogs are at all times.


It provides good reception, good battery life, holds up well. It updates where your dog is every 2.5 seconds. Maps are preloaded. I highly recommend it!

Really, the only downside is the price. It definitely is an investment. But my dogs are worth it. My peace of mind hiking is worth it. My not getting lost is worth it!

The $649.99 price includes: *Astro 430 handheld unit *T5 Dog Collar with lithium-ion battery and 1″ collar *5- inch standard and 13-inch extended range antennas for handheld *18.5-inch and 22.5-inch extended range antennas for T5 collars *Belt clip *Charging clip *USB cable *AC adapter *Vehicle charging adapter *Manuel

Click here to buy the Garmin Astro 430 Dog Tracking Collar?

If you hike with your dog off leash, or do any outdoor, off leash dog activity (hunting, Search and Rescue, camping, etc.), I highly recommend a tracking collar system for your dog.  The Garmin Astro series is the best I have found–reliable, sturdy, uploaded maps, great GPS coverage, useful for multiple dogs).

Let me know how you like your Astro 430 when you get one! Or if you have an earlier version as I do, how do you like that! Leave a comment below, or email me directly at keith@goodtimesdogtraining.com. And happy hiking!














  1. Very solid review. This seems like a must have for any dog owner that makes trips out into the wild.

    I’m curious though, does this work with Cats or is it too big?

    I have a couple of cats that tend to wander off in the neighborhood and it would be a relief to have the astro on em.



    1. Hi. I agree that the Garmin Astro is a must for any dog out and about. I have loved mine for years.
      Unfortunately, it’s too big for cats. But there are 2 products I know of that do work for cats. One is from Raven Gadgets and is a smart tag tracker. It is a tag on their collar, that works with GPS. I haven’t used it myself, but it sounds as if it would be a good option (you can use it with dogs, also).
      Another is the Whistle Dog Tracker, which I have used. It would be a good option for a cat. For me, I was out of cell service so often, it didn’t work that well. An advantage with it, though, is you can set a perimeter on your computer, and if the pet goes beyond that perimeter you get an alert. That feature does work very well.
      If you decide to try a tracker with your cat, let us know how it works! Maybe I’ll do a full review on cat tracking systems!
      Has anyone tried a tracker system with their cat, and how did it work?

  2. Jane,
    I love your website. Thanks for the review. I never knew the Garmin Astro existed. A must for some dogs that are “runners”. I think it would be a great gift for the person who has everything?


  3. Though I’ve been away from it for a while, I spent 5 years as a wilderness search and rescue canine handler, so I’m familiar with the Astro. Nice, concise review. I was part of a group of area dog handlers, so our dogs typically work out of our sight. We had one volunteer whose mixed breed dog was gone if she ever saw a deer, so the Astro was invaluable! Garmin is what all us handlers carried in our chest vests as well.

    Typo towards the end: “I highly recommend at tracking collar system”. “a” tracking collar system. Darn spell check doesn’t catch these!

    1. Now that I search with the tracking collar, I can’t imagine being without it. I know where my dog is, which is great. When I complete my task and go back to base, they can plug my handheld into their computer, and bring up a map with my track of where I have been, and a separate track of where my dog has been. It’s an awesome tool, because knowing what part of my area was well covered and where there are blank spaces lets them know how much more searching we need to do in that area.
      Do you miss searching?
      Thanks for picking up the typo. I fixed it. I’m a terrible editor–I miss a lot proof reading, so I appreciate the help!

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