Garmin Enduro 4 pairs a solar lens with a 1.4-inch MIP display for a rated 320 hours of GPS tracking, and the whole watch weighs 66 grams.
Garmin Enduro 4 is on sale now at $899.99, and Garmin calls it the longest-lasting solar GPS watch it makes. The footnotes carry the conditions. The 320 hours assumes continuous use in 50,000 lux sunlight with the extended-battery activity mode selected, and the 90 days in smartwatch mode assumes three hours a day outdoors in the same light. Someone who runs under tree cover or spends the day indoors should plan on less.
The software changes on the Garmin Enduro 4 are aimed at people who race long and hilly courses. Grade-adjusted pace targets for workouts and a grade-adjusted rolling pace let a runner judge effort on a climb by something other than a raw split. Stamina zones show how stamina shaped a single activity, and a stamina curve tracks how endurance shifts with fitness and training history. Garmin also added power modes: Max Accuracy gives full-feature tracking for shorter efforts, while Max Battery is the preset behind the 320-hour rating.
Garmin Epic is the feature for multiday trips. It groups activities recorded over days, weeks or months into one story in Garmin Connect, with photos and the health and performance data from that stretch added up, so a week on a long trail reads as one outing.
Garmin gives the watch 50% more RAM than the previous generation, which it says makes panning on the built-in routable maps 30% faster, and the updated map engine adds a perspective view. Storage rises to 64 GB for maps, music and data. The 51mm case combines a titanium bezel, a fiber-reinforced polymer body and a Power Sapphire lens, with 10 ATM water resistance and a flashlight that switches between white and red. A new ComfortFit Fabric Band works with QuickFit, which Garmin says makes adjusting and swapping bands simpler. Garmin describes the 66-gram weight as one of the lightest among ultraperformance smartwatches, a comparison it does not back with named rivals.
Two smaller training additions: indoor rowing now reports VO2 max and a power curve, and rucking lets wearers change pack weight mid-activity and set a calorie target. At that price the Garmin Enduro 4 is aimed at people whose events run long enough that charging becomes the problem, and the grade-adjusted metrics will do the most for those who train on hills.
