Coros Pace 4 review

I haven't worn the Pace 4. This review is built from Coros's product page and Outdoor Gear Lab's review, published May 22, 2026. The test numbers are theirs. The 7.8 is my opinion from reading them.

The money first. The Pace 4 is $249Not verifiedNot verified as of November 1, 2026. Coros's own page printed no price when I read it on November 8, 2026.

The battery holds up

Coros claims 41 hours of GPS in All Systems (High) mode. Outdoor Gear Lab measured 40 hours in All Systems mode. One hour short. That's about as close as a maker's claim gets to a lab result, and Outdoor Gear Lab called it remarkable for an AMOLED watch at this price.

What does 40 hours buy you? At an hour a run, about 40 runs between charges with GPS on.

The daily figure is shakier. Coros says up to 19 days of daily use. No test I read checked it.

Accuracy

Outdoor Gear Lab gave it 9.0 out of 10 for accuracy, a category that counts for 30% of its overall score. On a 2-mile course the Pace 4 logged 2.02 miles. That's 1% long, roughly 100 feet over two miles. I wouldn't lose sleep over it, and I'd trust it for pacing a race.

Weight, size and a thickness mystery

Coros says 32 g on the nylon band and 40 g on the silicone one. Outdoor Gear Lab weighed it at 31.2 g. So the light band is genuinely light. I'd take the nylon one, because 8 g is a lot on a watch this small, and you'll feel it on the wrist during a long run.

Then it gets messy. Coros says 11.8 mm thick. Outdoor Gear Lab's spec table says 16.0 mm, while its own review text uses 11.8 mm. One of those is a typo, and I can't tell you which from here. If thickness matters to you, under a shirt cuff for example, check it in a store.

Case size is the other gap. Coros doesn't list one on the product page. Outdoor Gear Lab measured a 49.0 mm body diameter. That's a big number for a 32 g watch, so I'd guess it includes the lugs, but that's a guess.

Water resistance: ask before you swim

This annoys me. Coros's Pace 4 page lists no water rating at all. Outdoor Gear Lab's spec table gives 50 m max depth. That's fine for pool laps and open water swimming if it's right. I'd still want the maker to put it on its own page before I took a new watch into the sea.

If you own a Pace 3

The Pace 4 replaces it and came out in November 2025, per Coros's own Pace series timeline. The big change is the screen: a 1.2-inch AMOLED touchscreen that Coros says has 164% more resolution than the Pace 3's.

No test I've read puts the two side by side. So whether battery or accuracy moved, I can't say. If your Pace 3 works and you're happy reading its screen in daylight, I'd keep it and save the money. If the old display is the thing you complain about, the Pace 4 fixes exactly that.

If you want maps on the wrist

Coros's Pace 4 page doesn't say whether it shows maps on the watch. If you navigate trails by watch, check before buying.

What I'd do

For a runner who wants long GPS life in a light watch, I'd buy it. The measured battery and the 2-mile result are the two numbers that matter most for training, and both look good. I'd knock points off for a product page that skips the water rating and case size, and for a thickness figure nobody seems to agree on.

One more thing. Outdoor Gear Lab is the only full test here. T3 and Wareable have reviewed it too, and I haven't read them, so a second opinion may change some of this.