Taking technology on the trail is hardly anything new. But the units available today continue to shrink in size and expand in functionality. Some even connect to your phone to be able to map and plan routes from the trailhead parking lot!
About this item
The Fenix not only navigates you in between points in the mountains, but also can connect to array of external sensors such as temperature sensors and geocaches.
This Suunto Ambit is a great trail-focused unit and the first generation Suunto GPS-integrated device. Plus, you can save a bit of cash over the 2/2s units and still get the barometric altimeter and basic app functionality.
The Garmin Tempe allows you to connect your Garmin Fenix unit to it and gather wireless temperature readings. Further, some iPhone apps can connect to it as well and gather historical temperature readings (with an ANT+ adapter).