Garmin GPSMAP handheld navigators are excellent outdoor GPS for hiking, cycling, geocaching or climbing.You are free to explore more with Garmin handheld navigation in the palm of your hand.

Here’s how the Garmin GPSMAP 60 series models are different and how to find the GPSMAP 64, 65 or 66 that’s best for your next outdoor adventure.

Key Differences between the Garmin GPSMAP 64, 65 & 66 Series

We’ll look at each GPSMAP unit below but first let’s look at the key differences between the GPSMAP 64, 65 & 66 series.

GPSMAP 66GPSMAP 65GPSMAP 64
GNSS SupportGPS, GLONASS, GalileoGPS, GLONASS, Galileo, QZSS and IRNSSGPS, GLONASS, Galileo
Resolution 240 x 400 pixels160 x 240 pixels160 x 240 pixels
MIL STD 810G ruggedness for thermal, shock and water performance
RINEX Logging
Bult-In Memory16 GB16 GB8 GB (4GB in GPSMAP 64)
Waypoints/ Favorites/ Locations 10,0005,0005,000
Track Log20,000 points, 250 saved gpx tracks, 300 saved fit activities10,000 points, 200 saved tracks10,000 points, 200 saved tracks
Routes250200200
Points per Route250, 250 points per route; 50 points auto routing200, 250 points per route; 50 points auto routing200, 250 points per route; 50 points auto routing
Federal Public Land Boundariesin 66sr
Live Track
Garmin Explore Compatible
Garmin Connect IQ Compatible

Garmin GPSMAP 64, 65 & 66 Model Differences

  • Garmin GPSMAP 66i – Send & Receive Text Messages, Share Location & Trigger SOS
  • GPSMAP x, t & i Models – All have preloaded topo maps
  • GPSMAP 65 Series – Routable TopoActive North America maps, Expanded GNSS Support
  • GPSMAP 64, 64x & 65 – Do not have an electronic compass or barometric altimeter

Comparison of GPSMAP 64, 65 & 66 Specifications & Features


Product GPSMAP 66i
gpsmap 66i
GPSMAP 66s
gpsmap 66s
GPSMAP 66sr
gpsmap 66sr
GPSMAP 64x
gpsmap 64x
GPSMAP 65
gpsmap 65
GPSMAP 65s
gpsmap 65s
Price 2.6” x 6.4” x 1.4” (6.6 x 16.3 x 3.5 cm)2.5″ x 6.4″ x 1.4″ (6.2 x 16.3 x 3.5 cm)2.5″ x 6.4″ x 1.4″ (6.2 x 16.3 x 3.5 cm)2.5″ x 6.4″ x 1.4″ (6.2 x 16.3 x 3.5 cm)2.5″ x 6.4″ x 1.4″ (6.2 x 16.3 x 3.5 cm)2.5″ x 6.4″ x 1.4″ (6.2 x 16.3 x 3.5 cm)
Unit dimensions1.5″W x 2.5″H (3.8 x 6.3 cm); 3″ diag (7.6 cm)1.5″W x 2.5″H (3.8 x 6.3 cm); 3″ diag (7.6 cm)1.5″W x 2.5″H (3.8 x 6.3 cm); 3″ diag (7.6 cm)1.43″ x 2.15″ (3.6 x 5.5 cm); 2.6″ diag (6.6 cm)1.43″ x 2.15″ (3.6 x 5.5 cm); 2.6″ diag (6.6 cm)1.43″ x 2.15″ (3.6 x 5.5 cm); 2.6″ diag (6.6 cm)
Display resolution240 x 400 pixels240 x 400 pixels240 x 400 pixels160 x 240 pixels160 x 240 pixels160 x 240 pixels
Display type transflective color TFTtransflective color TFTtransflective color TFTtransflective, 65-K color TFTtransflective, 65-K color TFTtransflective, 65-K color TFT
Weight w/ batteries8.5 oz (241 g)8.1 oz (230 g) 8.1 oz (230 g) 7.7 oz (217 g) with batteries7.7 oz (217 g) with batteries7.7 oz (217 g) with batteries
Battery rechargeable, internal lithium-ion2 AA batteries (not included); NiMH or Lithium recommendedRechargeable, internal lithium-ion2 AA batteries (not included); NiMH or Lithium recommended2 AA batteries (not included); NiMH or Lithium recommended2 AA batteries (not included); NiMH or Lithium recommended
Battery Life up to 35 hours at 10-minute tracking; up to 200 hours at 30-minute tracking (power save mode)Up to 16 hours (Standard mode)
Up to 1 week (Expedition mode)
Up to 36 hours
Up to 450 hours in expedition mode
16 hours16 hours16 hours
Waterproof✅ (IPX 7)✅ (IPX 7)✅ (IPX 7)✅ (IPX 7)✅ (IPX 7)✅ (IPX 7)
High-sensitivity reciever✅ Galileo, GLONASS & GPS✅ Galileo, GLONASS & GPS✅ Expanded – GPS, GLONASS, Galileo, QZSS and IRNSS✅ Galileo, GLONASS & GPS✅ Expanded – GPS, GLONASS, Galileo, QZSS and IRNSS✅ Expanded – GPS, GLONASS, Galileo, QZSS and IRNSS
Interfacehigh-speed USB and NMEA 0183 compatiblehigh-speed USB and NMEA 0183 compatiblehigh-speed USB and NMEA 0183 compatibleUSB and NMEA 0183 compatiblehigh-speed USB and NMEA 0183 compatiblehigh-speed USB and NMEA 0183 compatible
MIL STD 810G ruggedness for thermal, shock and water performance
RINEX logging
LED beacon flashlight
Basemap
Preloaded maps✅ (TopoActive U.S and Canada; routable)✅ (TopoActive U.S and Canada; routable)✅ (TopoActive U.S and Canada; routable)✅ (TopoActive U.S and Canada; routable)✅ (TopoActive U.S and Canada; routable)
Ability to add maps
Federal public land boundaries
Built-in memory 16 GB16 GB16 GB16 GB16 GB16 GB
Accepts data cards✅ (32 GB max microSD™ card)✅ (32 GB max microSD™ card)✅ (32 GB max microSD™ card)
Waypoints100001000010000500050005000
Routes250250250200200200
Track Log 20000 points, 250 saved gpx tracks, 300 saved fit activities20000 points, 250 saved gpx tracks, 300 saved fit activities20000 points, 250 saved gpx tracks, 300 saved fit activities10,000 points, 200 saved tracks10,000 points, 200 saved tracks10,000 points, 200 saved tracks
Map segments 15,00015,00015,000300030003000
Automatic Routing ✅ (with optional mapping for detailed roads)
Bluetooth/ANT+/WiFiBluetooth, ANT+ and WiFiBluetooth, ANT+ and WiFiBluetooth, ANT+ and WiFiBluetooth and ANT+ Bluetooth and ANT+
Electronic Compass✅ (tilt-compensated, 3-axis)✅ (tilt-compensated, 3-axis)✅ (tilt-compensated, 3-axis)✅ (tilt-compensated, 3-axis)
Barometric altimeter✅ ✅ ✅ ✅ 
Accelerometer✅ ✅ ✅ 
Camera
Picture viewer✅ ✅ ✅ ✅ ✅ ✅ 
Custom map compatible✅ (500 custom map tiles)✅ (500 custom map tiles)✅ (500 custom map tiles)✅ (500 custom map tiles)✅ (500 custom map tiles)✅ (500 custom map tiles)
BirdsEye satellite Imagery CompatibleBirdsEye direct to device (no annual subscription required)BirdsEye direct to device (no annual subscription required)BirdsEye direct to device (no annual subscription required)
Geocaching-friendly ✅ (Geocaching Live)✅ (Geocaching Live)✅ (Geocaching Live)✅ (Paperless)✅ (Paperless)✅ (Paperless)
Hunt/Fish calendar
Sun and moon information
Area calculations
Custom POIs
Smart Notifications
Live Tracking
Garmin Connect compatible
Garmin explore compatible
Garmin connect IQ compatible
inReach remote widget built in inReach capabilities
Trigger an interactive SOS with 24/7 search and rescue monitoring center
Send and receive text messages to SMS and email
Send and Recieve messages with other inReach users, Exchange Locations
Track and share location with friends and family on web-based MapShare portal
Virtual keyboard for custom text messaging
Request weather forecasts for current location and planned destination
Wikiloc (Preloaded with the Wikiloc app with risk-free trial offering more than 9 million trails for download)

Garmin GPSMAP 64, 65 & 66 FAQs

I like the 66 sr but the internal battery worries me. What gps is equivalent with replaceable batteries without losing water proof features and shock resistance ?

The closest unit to the 66SR that would take AA batteries would be the Garmin GPSMAP 65S this unit will have the advanced GPS receiver and the capabilities of doing GNSS.