Heart rate and GPS watches for trail running

The trail runner's tool

The GPS watch has become the essential tool for trail runners. It records the distance, pace, and especially the elevation gain, the key data in trail running, where we think in terms of meters of ascent as much as in kilometers. It measures heart rate to manage effort during long climbs, and allows you to follow a route to avoid getting lost on unfamiliar paths. The data can then be analysed through an app to track progress.

Other equipment

Trail equipment also includes:

• Trail running poles.
• Lighting.

All equipment can be found on the equipment page.

Useful functions for trail running

The barometric altimeter, which measures altitude by air pressure, is much more accurate than GPS alone for calculating elevation gain. The multisystem GPS, or multiband, which picks up signals from multiple satellite constellations, maintains good accuracy under trees and in narrow valleys. The navigation feature shows the route of the run or itinerary and alerts you if you stray off course. The wrist-based heart rate monitor, using optical sensors, is sufficient for everyday use; a chest strap remains more accurate for interval training.

Battery life and comfort

In trail running, battery life is crucial: a mountain run can last several hours or even an entire night. You check the battery life in GPS mode, not just in regular watch mode, considering power-saving modes that space out readings. The case should withstand impacts and water, and the screen must remain readable in bright sunlight. The flexible strap, made of silicone or fabric, should be comfortable to wear for several hours without causing irritation. You charge your watch the night before a long outing and update the route before heading out.

Good deals

Good bargains can also be found in the good deals, promotions, clearance sales, sales, and Black Friday. The new arrivals showcase the latest collections, and items shipped within 24 hours are prepared and sent out the same day. The key events of the year follow a stable pattern: the Black Friday at the end of autumn, the holiday season, winter sales, the spring French Days, followed by summer sales and back-to-school promotions.

Frequently asked questions

Barometric altimeter or GPS: what's the difference?

GPS calculates altitude via satellite, with discrepancies of several meters. The barometric altimeter measures air pressure and provides a much more accurate elevation gain, essential in trail running.

Is the wrist-based heart rate monitor reliable for trail running?

It's reliable for endurance, but less so during sudden changes in pace or if the watch shifts on your wrist. A chest strap is more accurate for interval training.

How many hours of GPS battery for an ultra?

Aim for a battery life in GPS mode that exceeds your expected race time, with some margin. Power-saving modes, which space out readings, allow top watches to last for several days.

What is the purpose of the multisystem GPS?

It captures signals from multiple satellite constellations at once, such as GPS, Galileo, and Glonass. The tracking remains accurate in dense forests or narrow valleys, where a single system might lose signal.

How do I follow a route using my watch?

Import the GPX file of the route into the watch's app, then start navigation: the watch displays the track and vibrates if you stray off the designated path, which is handy on an unfamiliar trail.