Garmin/eTrex Touch 35

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Garmin eTrex® Touch 35
Description outdoor navigator (direction;routing)
GNSS ? channels
chipset: ?
augmentation: ?
DOP: ?
Memory Internal: 8GB (10.000 max logging). External: ? microSD™ card.
Host system ? (operating system: ?)
Display transflective, 65K color TFT (160 x 240 pixels)
Integrated equipment Handlebar mount, USB cable & Documentation
Connectivity usb
Batteries 2xAA (16 h lifetime)
Yes check.svg addresses Yes check.svg points of interest
Yes check.svg mass storage mode Yes check.svg Waterproof
Price 299€ / $299.99 / £229.99
Website official link Produktseite

General description

The Garmin eTrex Touch 35 is touch operated GPS and the "big brother" of the Garmin eTrex Touch 25 but with added barometric altimeter and connectivity options for Ant+ sensors and Bluetooth. Like the rest of the eTrex serie, the intended use is hiking but the standard screen also support biking. The GPS comes with OSM based maps preloaded.

specification despcription
Display transflective, 65-K color TFT (160 x 240 / 65K color)
Display size 1.43" x 2.15" (3.6 x 5.5 cm)
Interface USB
Slot microSD™ card
Dimensions (W x H x D) 2.3” x 4.0” x 1.3” (5.8 x 10.2 x 3.3 cm)
Weight 5.6 oz (159 g) with batteries
Battery 2 x AA / 16 hours
Ships with eTrex Touch 35, Handlebar mount, USB cable & Documentation
Misc USB

Survey settings

By default the storage interval is set to Auto which is not the best for survey.

  • Go to the settings menu by shortly pressing the power button and select Settings
  • Select Tracks

Directory structure

If you connect GPS using an USB cable to your computer it will either automatically go to Mass Storage mode or ask "Would you like to got to Mass Storage?" with a Yes and No button. If you press No you the GPS will switch to "garmin mode", if you press Yes it will go to Mass Storage mode.

If you have a microSD card loaded, Mass Storage mode will show you the contents of the microSD card, if not loaded, it will show the internal memory. Activities and tracks are stored in the internal memory so if you want to download them you have to make sure the microSD card slot is empty.

directory structure internal memory
path file(s) description
/ Autorun.inf Not sure, action=Garmin eTrex Touch 35t, label=Garmin eTrex Touch 35t
/Garmin/ 'Root' directory
/Garmin/ *.img; *.sum Preinstalled maps
  • gmapprom.img is the TopoActive OSM based (35) or Garmin (35t) pre-installed map
  • gmapbmap.img is the base map containing only major roads and large cities.
/Garmin/ gmaptz.img Time Zone Map
/Garmin/ *.gma Certificate?
/Garmin/Activity *.fit Tracks in Flexible and Interoperable Data Transfer (FIT) format.
/Garmin/BirdEye/ *.JNX BirdEye satellite image data
/Garmin/CustomMaps/ *.img The place to store your custom/OSM based maps.
/Garmin/CustomSymbols/ ?
/Garmin/ExtData/ *.bin ?
/Garmin/Filters/ *.gff Filter definitions files in XML format.
In the Geocache subdirectory there are standard "All Found.gff", "All Geocaches.gff" etc.
/Garmin/GZZ/ preload.* Three files: preload.ggz, preload.sum and preload.ver.
/Garmin/GPS/ * Three files: ARC.BIN, BEE.BIN and NT.NVM
/Garmin/GPX/ *.gpx Waypoints and routes that you create are stored here
/Garmin/GPX/Current Current.gpx This is the "current" GPS track, for past GPS track see the Activity folder
/Garmin/GPX/NAV ?
/Garmin/Profiles *.gpf Profile definitions files in XML format. For example "Bike.gpf" and "Hike.gpf"
/Garmin/RemoteSW *.GCD ?
/Garmin/SQL *.db; *.sqlite3 Database files: CustomMaps.db, system.db and UserData.sqlite3
/Garmin/Text *.gtt Language files (German.gtt, Turkish.gtt etc.)

Garmin Connect

Connecting with a smartphone can be done using the Garmin Connect app. The basic use for this is so you can have notifications on your mobile send to the GPS and to have Activities saved to the cloud. The connection with the phone is made using Bluetooth.

If you upload an "activity" to Garmin connect, you can then visit and export your activity as GPX. There is no option in Garmin Connect to send tracks from your smartphone to the GPS.

Sharing data between two GPS units wirelessly

You can exchange tracks and other info with another eTrex or Oregon device (Edge devices does not seems to work), this is done using Ant+.

To do so:

  1. Select Share Wirelessly in the "Power Key Menu"
  2. Select Receive for the device that should receive the data
  3. Select Send for the device sending the data and then further select what to send
  4. Follow further the on-screen instructions


  1. eTrex Touch 35 - specifications