Key takeaways
- A GPS watch uses satellites to track location, distance, pace, route, and often elevation.
- It blends fitness tracking with navigation — breadcrumb trails, routes, and (on some) full maps.
- Battery life, accuracy, and durability matter most for long backcountry days.
- It's a convenient navigation aid, not a replacement for a map and compass backup.
What a GPS watch is
A GPS watch is a wrist-worn device that uses satellite positioning to track your location, distance, pace, speed, route, and usually elevation. It merges fitness tracking with navigation: alongside training data, many can follow a preloaded route, record a breadcrumb track to retrace your steps, and display navigation info on the trail.
Features to compare
- Battery life — the big one for long days; continuous GPS drains fast.
- Accuracy — multi-band GPS holds position better in canyons and forest.
- Navigation — breadcrumb tracking vs full onboard maps and routing.
- Durability & sensors — ruggedness, heart rate, barometric altimeter, compass.
Before an ultra, a runner loads the course onto their GPS watch and runs in a battery-saver mode so it lasts the full distance — following the on-screen track at confusing junctions, while still carrying a paper map as backup.
Not a replacement for map and compass
A GPS watch is a powerful aid, but batteries die and signals drop. Always carry and know how to use a map and compass, and consider a satellite messenger for emergency communication in remote terrain. Save key waypoints for navigation.
The bottom line
A GPS watch puts location, distance, pace, and route tracking on your wrist, blending fitness data with handy navigation for hikers and runners. Prioritize battery life, accuracy, and durability for your longest days — and treat it as an aid that enhances, but never replaces, a map-and-compass backup in the backcountry.
Frequently asked questions
What does a GPS watch do?
A GPS watch uses satellite signals to track your position, so it can record your distance, pace, speed, route, and elevation in real time. Beyond fitness metrics, many can follow a preloaded route, drop a breadcrumb track to retrace your steps, and show navigation data — making them useful for both training and backcountry travel.
How important is battery life on a GPS watch?
Very, for long days. Continuous GPS tracking drains batteries, so a watch that lasts a few hours may not survive a long ultramarathon or multi-day trek in full-accuracy mode. Look at the rated GPS battery life and any battery-saver/lower-accuracy modes if you do long efforts, and carry a backup plan.
Can a GPS watch replace a map and compass?
No — it's a convenient aid, not a substitute. Batteries die, signals can be lost in deep canyons or forest, and devices fail. Use a GPS watch to enhance navigation, but always carry and know how to use a map and compass as a non-electronic backup, especially in remote terrain.
Sources
- GPS & navigation — USGS
- Navigation tools — The Mountaineers