Garmin Foretrex 401

Perfect for hikers, campers, and skiers, the Garmin Foretrex 401 consists of a slim GPS navigator mounted on the wrist. You can keep track of your altitude, route, and bear with its high-sensitivity GPS receiver, electronic compass, and barometric altimeter. Retracing your steps is equally easy. Garmin Connect enables you to track and analyze your data in one place. However, this smartwatch requires two AAA batteries, meaning that you just might need to carry along a spare in case they run out.

Pros
High-sensitivity GPS receiver
TracBack feature
Heart rate monitor
Water-resistant
Wider compatibility

Cons
Battery life may be a cause for concern