Garmin eTrex 20x Hiking GPS Review

Garmin eTrex 20x Hiking GPS Review

In This Guide
  • Why you should get the eTrex 20x
  • How to get free maps for the eTrex 20x
  • eTrex 20x or a smartphone?
  • Using your eTrex 20x

The Garmin eTrex 20x is your best bet for an inexpensive,  dedicated, outdoor ready hiking GPS. There are more expensive models, and smartphone alternatives, but for a lot of hikers, the eTrex 20x will give you the best bang for the buck. Here’s why I recommend it.

If you find this guide helpful, you can help support this site by buying the eTrex 20x with this link to REI. You get a discount up to 10% with an inexpensive REI membership and free shipping. It ends up being cheaper than buying from Amazon, there are benefits to buying from REI, and you help support free hiking guides for everyone.

What the Garmin eTrex 20x Is and Is Not

The eTrex 20x is a small, outdoor ready mapping GPS unit. You can follow a pre-made track or route, or navigate to a waypoint. Or you can navigate by looking at the loaded maps on the small color screen. It’s waterproof, rugged, and outdoor ready (so unlike most phones, you can drop it without shattering the screen).

If you read the reviews for the eTrex 20x (especially on Amazon), you’ll see that many people give it low stars and complain about the maps. Garmin’s marketing makes it seem like you can start mapping hikes out of the box with this thing, and it’s not true.

Garmin includes a base map, which will basically tell you what city you’re in and what interstate is close to you. It’s pretty worthless, BUT BUT BUT you can get free topographic maps and load them on the unit very easily. No need to buy expensive Garmin maps. And Garmin provides a free program called Basecamp (Windows and Mac) that’s a great tool for planning routes and loading them onto the unit. I use it all the time.

free mt whitney map
Here’s an example of the very detailed and free topographic trail maps you can get for the eTrex 20x.

So with the free maps, and Basecamp for planning, the Garmin eTrex 20x is powerful tool. It’s small, rugged, and easily helps you navigate the trails. Whenever someone asks me for an inexpensive GPS recommendation, I tell them to get the eTrex 20x. I carry one myself and use it in addition for my Fenix and smartphone (because I’m a freak about having backups).

When I was younger I might’ve eschewed the use of something like this, but as I get older, I appreciate knowing exactly where I am at any given time. I wouldn’t hit the trail without it. – REI Reviewer

Garmin eTrex 20x Video Review

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Why the eTrex 20x Is a Great Hiking GPS

It Has the Crucial Navigation Features

Garmin eTrex 20x Hiking GPS Review
The basic function of a hiking GPS is to follow and record tracks and waypoints, which the eTrex 20x does very well. No bells and whistles, just you, a map, tracks, and waypoints. Skip the bluetooth, WiFi, and other stuff. Just more things that can run your battery down and/or potentially fail.

There are some basic functions that I look for in a hiking GPS, and the eTrex does all of them well. Here’s what it does:

In addition to those basic functions, the eTrex 20x has some bells and whistles that I like.

The GPS Is Solid

Garmin eTrex 20x Hiking GPS Review
A GPS status screen lets you know what birds (insider lingo for satellites) you’re receiving.

A hiking GPS is really only as good as the signal it can get, and the eTrex is solid in that department. It picks up a signal very quickly (actually quicker than some of the more expensive units that I tested). In addition to standard GPS signals, it also has WAAS, which can improve accuracy. You can also enable GLONASS support, which is Russia’s version of GPS. Enabling GLONASS allegedly improves your accuracy by up to 20%. I enable GLONASS and WAAS and it works great. If you want to save battery, you can also turn those features off.

I didn’t have scientific way of testing the GPS versus other units, but I did do dozens of real world hike spot checks on the eTrex 20x, Fenix 3HR, iPhone 7 Plus, and Oregon 700. Every time I checked, the eTrex 20x was within 20 feet or so of all the other positions, which is good. And I confirmed that GLONASS improved accuracy a bit. And just a reminder, unless you’re geocaching, it’s not that crucial to know exactly where you are. I generally use it to see if I’m on the right trail, and that’s generally pretty obvious.

The Battery Works Well

Garmin eTrex 20x Hiking GPS Review
A d-ring twist opens the back panel where you can change the AA batteries. This picture also gives you an idea of how compact this unit is (compared to the AA batteries).

First off, I love that it uses AA batteries. That means you can just carry extra batteries when you need more juice. They can be rechargeable batteries, or the same old AA you can get in any gas station. No need for USB chargers, solar panels, or anything else fancy. Carry some extra AA batteries in your pack and call it a day.

With normal alkaline AA batteries I get about 22-24 hours of batteries depending on my backlight brightness and how much I use it.  When I used Lithium batteries I got between 40-50 hours of use. The lower number seemed to be when I was in canyons where it had to work more to lock onto a signal. The 50 hours were in my “normal” hiking with better line-of-sight.

To maximize your battery life, turn off GLONASS, WAAS, and minimize the backlight.

Our eTrex 20x used only one set of AA lithium batteries to complete 93 miles in 9 days on the Wonderland Trail – REI Reviewer

Other Notable Features

Garmin eTrex 20x Hiking GPS Review
You can customize the data fields that you see, as well as the order of the menu items so that your frequently used functions are up top.

What Could Be Better

Great if your a hiker of any sorts – easy to use, multifunctional, I like that you can update it and load files on for trips and change them out for other trips, great that you can load hikes from where you never been, nice having peace of mind of not getting lost, batteries last a good long while, not heavy and easily packable – Amazon Reviewer

Comparing the eTrex 20x To Other GPS Options

There are a lot of GPS options, which is a great thing for us hikers. Here’s how the eTrex 20x stacks up to the other GPS options on the market.

eTrex 20x or a Smartphone

Garmin eTrex 20x Hiking GPS Review
The eTrex 20x next to an iPhone 7 Plus with Gaia GPS.

Your smartphone is probably thousands of times more powerful than the eTrex 20x. The screen resolution probably leaves the eTrex 20x in the dust. But phones are only good if they work, and most phones aren’t as rugged as the eTrex 20x.

First, cell phones are notorious for going dead, especially in the backcountry. What typically happens is that you lose a cell signal, then your phone starts constantly searching for a signal, which quickly drains the battery. You can solve this problem by putting the phone in flight mode, but some phones don’t allow the GPS to work in flight mode. So it can get tricky. I typically use my iPhone in offline mode with Gaia GPS in addition to a dedicated GPS unit like the eTrex 20x. If you’re interested in a Gaia GPS premium membership, HikingGuy readers get 20-40% off with this link:

The other issue is the durability of a smartphone. If your phone isn’t waterproof, you need to protect it from moisture (easily solved with a plastic sandwich bag). The bigger issue for me is the screen. Most phones aren’t shatter-proof, and my sweaty hands have dropped a few phones, cracking the screen. I even tried rugged cases like the Otterbox, and still cracked them. The phone doesn’t have to hit the ground with force to crack, it just has to hit at a certain angle or spot and a crack or shatter.

eTrex 20x or a Bigger/Better Handheld GPS

Garmin eTrex 20x Hiking GPS Review
Here’s a higher-end model that costs hundreds more. If you don’t have a need for the extra bells and whistles, it’s probably not worth the money.

The nice thing about the eTrex 20x is that it gives you the basic, most useful GPS functions in a small, inexpensive package. If you look at the more expensive models from Garmin, etc., they bundle in extra features that aren’t important for most hikers.

For example, take a look at the high end Garmin 750t, another handheld mapping GPS. For about $350 more than the eTrex 20x, you get: a bigger screen (maybe worth it), a camera (which you probably have anyway), topographic maps (which you can get for free), WiFi/Bluetooth connectivity (who cares on the trail), and some other minor features. Now maybe one of these features is important to you for whatever reason, in which case go for it. But if you just want a solid GPS for hikes, you don’t really need all the bells and whistles.

eTrex 20x or a GPS Watch

Garmin eTrex 20x Hiking GPS Review
The eTrex 20x next to a Fenix 3 HR.

My main GPS device is a Garmin Fenix. I use it for basic navigation checks, and also as a powerful workout tracker (I use it for running, hiking, biking, swimming, etc.). I also use the eTrex 20x. The eTrex 20x has a bigger screen, and is easier read and navigate from. It’s also a fraction of the cost of a GPS watch. If you’re looking for a full featured device that lives on your wrist, the Garmin Fenix is the move. If you want a basic GPS for the trail, go with the eTrex 20x.

eTrex 20x or the eTrex 30x

Garmin eTrex 20x Hiking GPS Review
The Garmin eTrex 30x looks identical (aside from the color). Notice the detailed topographic map screen that Garmin includes in their standard product shot. If I saw that on a product listing, I’d think the maps came with it too (the don’t).

These two units are almost identical. The difference is that the eTrex 30x has a built in compass and altimeter, and the eTrex 20x does not. The eTrex 20x uses the GPS and movement to determine your compass heading. If you’re standing still, you won’t get an accurate compass reading. And the eTrex 20x uses GPS map data to determine your altitude, while the 30x actually uses a built in barometric altimeter. If those features are important to you, spend the extra few bucks for the eTrex 30x. Otherwise the units are identical.

There are also eTrex Touch devices that have touch screens. I found the buttons on the eTrex 20x to work better for me than the touch screen, especially when my hands were cold or wet.

Buying The eTrex 20x

Garmin eTrex 20x Hiking GPS Review
REI is a good option to buy the GPS since you can return it easily. You can buy online or in the store, and you can return to either option too.

I highly recommend ordering your eTrex 20x from REI. You can probably get it for a few dollars cheaper on Amazon, but that comes with a risk. Usually the eTrex 20x is sold through a third party on Amazon, and it’s hard to return or get support on. With REI, there are no hassle returns, you can go to a store and get help using it, and you get the REI member dividend back.

5 star. Works great. Accurate. Great price for value. – Amazon Reviewer

If you’re thinking about buying the Garmin eTrex 20x, there’s something important you can do to help support this site. Simply click on the link below to REI and purchase the unit from REI online. I get a small percentage of the sale, which helps me keep the website alive and produce unbiased reviews and free hiking guides.

Check out eTrex 20x Reviews and Prices at REI

Setting Up Your eTrex 20x

Garmin eTrex 20x Hiking GPS Review
This is what comes out of the box, plus some paperwork and packaging. No mounts or lanyards are included.

When you first get the eTrex, there’s not much to it, just a unit and a USB cable (it uses a mini-USB connector on the unit). If you want a manual, check out the online version which is easier to read than the miniature version they package with the unit.

Here’s how to get started.

  1. Head to Garmin Connect and setup an account if you don’t have one yet.
  2. Install the free Garmin Express software on your computer (Windows and Mac).
  3. Start Garmin Express, put batteries in the unit, and plug in the USB cable.
  4. Garmin Express should recognize the unit and ask you to register it.
    Garmin eTrex 20x Hiking GPS Review
    Garmin Express asking me to register my device.
  5. Garmin Express will check for updates and make sure your device is up to date. Go through all these steps to update the software (if prompted).
    Garmin eTrex 20x Hiking GPS Review
    Use Garmin Express to check for updates. To send tracks and waypoints back and forth to the device, use Garmin Basecamp.
  6. Download Garmin Basecamp and install on your machine.
  7. Download free topographic maps from your region from GPSFileDepot (or jump ahead to the topographic maps I use at GMapTool).
  8. Follow the directions on those sites to install the maps onto your device. It’s different for Windows and Mac, and different for each map service.
  9. After you go through those steps to send the maps to your device, launch Basecamp, go to Setup > Maps and enable your new maps (and disable the default map if you don’t want to see it).
    Garmin eTrex 20x Hiking GPS Review
    You can install multiple maps in Garmin Basecamp and easily switch between them.
  10. Go through the eTrex 20x setup and customize other aspects of the device if you’d like. Here are some recommendations.
    1. Turn the Battery Saver on and set the screen timeout to 15 seconds.
    2. Turn off WAAS and GLONASS if you want to save your battery.
    3. Check that your units are set correctly (believe mine came as metric).
    4. Make sure your battery type is set correctly (alkaline, lithium, etc.)
    5. Customize the data fields.
    6. Disable the default map and enable your new (free) maps

How to Use the eTrex 20x

 Works great after it’s setup and you actually learn how to use it. – Amazon Reviewer

The Interface

Not much to say here, aside that it’s pretty simple to use once you get used to the buttons and menu. You can customize things like the menu order and data fields shown. Here’s how it works.

Garmin eTrex 20x Hiking GPS Review
The joystick button is your main move. Use it to move around the menus, and a press in on it selects an option.
Garmin eTrex 20x Hiking GPS Review
The back button will walk you back to the main menu. A short press on the lower button adjusts your backlight and shows battery and GPS level. Long pressing this turns the unit off.
Garmin eTrex 20x Hiking GPS Review
The menu is old-school but simple and easy to use. You can change the order of these items to put your frequently used functions at the top.

Planning Your Route

I highly recommend planning your route on your computer before you start. It’s much easier than planning a route on the small screen of the eTrex 20x. I have a whole article on planning your hike here. Once you have your route or track, send it to your device.

Garmin eTrex 20x Hiking GPS Review
It’s very easy to plan routes in Garmin Basecamp. The key is to download maps that are routable. This will allow Basecamp to automatically snap tracks onto the twists and turns of the trail.

It Works Like A Trip Computer

If you’re used to a fitness model of the Garmin, the eTrex 20x works differently. On a fitness model like a Fenix, you hit start, and it tracks your activity like a stopwatch until you hit stop. The eTrex 20x works more like a car odometer. When you want to start a new hike, you reset the trip computer and it starts recording while the unit is on. When you’re done, you save the track and reset the computer.

Garmin eTrex 20x Hiking GPS Review
The trip computer is usually what I check out if I’m not looking at the map. It gives me the important data like time and distance. You can customize this screen to meet your needs.

Following a Route

In Garmin Basecamp you can create routes, which are similar to turn by turn directions on an automotive GPS. You simply create it, send it to the eTrex 20x, and then navigate using the route. When there’s a turn or change in the route, the unit will wake and chime to alert you. I wouldn’t rely on this as your sole way to navigate, but it’s handy.

Garmin eTrex 20x Hiking GPS Review
Here I am following a route send to the eTrex 20x. When I approach a trail junction, the unit chimes and the screen comes back on. It’s not as slick as a car GPS, but I can look at the purple route line and figure out which way to go pretty easily.

Following a Track

You can also download GPX tracks (like the ones from this website) and view them on your device. Send the track to the device in Basecamp, and then simply bring it up on the device. If you’re on the purple line, you’re on the track. It’s handy when you come to an intersection and need to figure out which way to turn. And (obviously) nice if you’re navigating off trail as well.

Garmin eTrex 20x Hiking GPS Review
Following a track is pretty simple, just stay on the purple line. I prefer this method because it’s simple and works. When I come to a junction, I just look at the screen and see if I’m on my intended path. In this screenshot you can see that I’ve strayed off the trail.

Waypoint Proximity

You can set a proximity alarm for a waypoint. When you get close to the waypoint, the unit will wake and chime. This is helpful for important locations on the trail, for example, and unmarked turn.

Garmin eTrex 20x Hiking GPS Review
This is what the proximity alarm looks like. You can set an alert for when you get close to a waypoint. When the alarm goes off, you hear a chime and the screen comes on (from sleep).

Marking and Navigating to Waypoints

This is a basic function on most GPS units, and the eTrex 20x supports it too. You can mark a waypoint where you are, or use the joystick to scroll around the map to mark a waypoint. You can then navigate to any waypoint, with the unit’s compass pointing you in the right direction.

I have used by eTrex 20x for two hiking/hunting/fishing seasons. It has proved to be a very rugged and reliable GPS. I bought it to geocache and it also proved to be very accurate. For off-trail use in heavy PNW forest, it was indispensable. Got me back to the vehicle every time. – Amazon Reviewer

Getting Help With Your Garmin eTrex 20x

Unfortunately I’m not able to provide tech support for everyone who emails with an eTrex question. Here’s where to go for help:

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