Garmin GPSMAP 66i

Order by 9am PT on Dec. 17 for delivery before Dec. 25. Members get free shipping! Learn More (Opens in a new window)
Choose a shipping method
To buy, sign in as an REI Co-op Member or join now.
Members get an estimated $60.00 back on this item.
Join the co-op today to get access to a lifetime of benefits.

Members, get an estimated $60.00 back on this item as a part of your annual .

Precise GPS navigation meets global messaging in the rugged, handheld Garmin GPSMAP 66i. It comes with preloaded TOPO maps and inReach® technology (subscription required) for 2-way messaging and SOS.

  • Features

    • Button-operated GPS handheld and satellite communicator with interactive SOS alerts
    • Large 3 in. sunlight-readable color display is easy to view
    • Buttons provide simple operation even with gloves or in the rain
    • Trigger an interactive SOS to the GEOS 24/7 search and rescue monitoring center; exchange 2-way messages via the 100% global Iridium® satellite network (subscription required)
    • Preloaded Garmin TOPO mapping with direct-to-device BirdsEye Satellite Imagery downloads (no annual subscription)
    • Includes multiple Global Navigation Satellite Systems (GNSS) support and navigation sensors
    • Cellular connectivity lets you access Active Weather forecasts and Geocaching Live
    • Compatible with the Garmin Explore™ website and app to help you manage waypoints, routes, activities and collections, use tracks and review trip data from the field
    • Internal, rechargeable lithium battery provides up to 35 hrs. of battery life in 10 min. tracking mode (and 1 min. tracking mode with display off
    • Expedition mode (30 min. tracking intervals) provides up to 200 hrs. of battery life
    • IPX7 rating means the GPSMAP 66i is considered waterproof; it can withstand submersion in water up to 1m deep for up to 30 min.


    Note: Some jurisdictions regulate or prohibit the use of satellite communication devices. It is the responsibility of the user to know and follow all applicable laws in the jurisdictions where the device is intended to be used.

    A subscription plan is required to send and receive satellite messages on this device. Visit vendor website to shop satellite subscription plans and additional services.
    View all Garmin Handheld GPS
  • Technical Specs

    Best Use


    Preloaded Map




    Wireless Communication


    OS Compatibility

    Windows / Mac

    Display Size

    3 inches

    Screen Pixels

    240 x 400 pixels

    Visual Map Display


    Color Screen


    Number of Routes


    Number of Waypoints


    Internal Memory

    16 gigabytes

    Expandable Memory






    Quad Helix Antenna


    Compact Antenna


    Position Accuracy

    3 meters

    Battery Type

    Lithium Ion

    Average Battery Life

    Up to 35 hours


    6.4 x 2.6 x 1.4 inches

    Water-Resistance Rating



    8.5 ounces

  • Reviews
    98 reviews with an average rating of 3.4 out of 5 stars

    Loading Reviews...
  • Questions & Answers

    Loading Questions...