Garmin has introduced the Enduro 4, a new GPS smartwatch designed for ultra-endurance athletes, trail runners, backpackers, and adventurers who need long battery life, detailed navigation, and advanced training metrics. The watch combines solar charging with an energy-efficient display, delivering up to 90 days of battery life in smartwatch mode or up to 320 hours in activity mode under Garmin’s specified solar conditions.

Announced in October 2026, the Enduro 4 builds on the Enduro 3 with more memory, faster map navigation, additional endurance-tracking tools, and a new ComfortFit Fabric Band. Rather than changing the formula dramatically, Garmin has focused on improving the features that matter most during long races and multi-day outdoor adventures.

Garmin Enduro 4 focuses on extended battery life

The Enduro 4 uses a 1.4-inch memory-in-pixel (MIP) display paired with a solar-charging lens. The low-power screen is designed to remain readable outdoors, while solar charging can extend the time between conventional charges when the watch receives sufficient sunlight.

Garmin rates the watch for up to 36 days of battery life in smartwatch mode without solar charging, increasing to 90 days with solar assistance under its stated conditions. For GPS activities, the watch can last up to 120 hours in GPS mode, or up to 320 hours in the extended-battery activity mode with solar charging.

These figures depend on usage and environmental conditions. Garmin’s solar estimates assume outdoor exposure at 50,000 lux, including three hours per day in those conditions for the smartwatch-mode estimate. The 320-hour activity figure assumes continuous use of the extended-battery mode under the specified solar conditions.

The watch also includes configurable power modes, letting users prioritize tracking accuracy for shorter workouts or conserve energy for longer outings. That flexibility is particularly relevant for ultramarathons and multiday expeditions, where charging opportunities can be limited.

New training features target trail runners and endurance athletes

The Enduro 4 introduces several training tools designed to help athletes manage their effort across steep climbs, rolling trails, and long-distance activities.

• Grade-adjusted pace targets: Help runners set workout targets that account for changes in elevation, rather than relying only on flat-ground pace.
• Grade-adjusted rolling pace: Provides a real-time view of pace across varying terrain, helping runners judge their effort on hills.
• Stamina zones and stamina curve: Offer additional insight into how stamina affects an ongoing activity and how endurance changes over time based on fitness and training history.
• Garmin Epic: Groups activities recorded over days, weeks, or months into a combined story in Garmin Connect, with options to add photos and share the experience.

The watch supports more than 100 activity profiles. Garmin has also expanded its indoor rowing metrics with VO2 max and power-curve data, while rucking activities now let users adjust their pack weight during a workout and set targets such as calories burned.

Faster maps and more storage

Garmin has upgraded the Enduro 4’s internal hardware and mapping system to make navigation more responsive. The watch has 50% more RAM than the Enduro 3, alongside an updated map engine that Garmin says delivers 30% faster map panning.

Its Perspective view provides additional detail both nearby and farther along a route, helping users anticipate upcoming terrain while navigating. These changes are particularly relevant to hikers and trail runners who rely on built-in routable maps in unfamiliar areas.

Storage has also doubled from 32GB on the Enduro 3 to 64GB on the Enduro 4, leaving more room for onboard maps, music, and other data.

Design, durability, and comfort

The Enduro 4 retains the rugged design of its predecessor, with a 51mm case, a titanium bezel, a fiber-reinforced polymer case, and a scratch-resistant Power Sapphire lens. It weighs 66 grams with its band, while the watch itself weighs 57 grams.

Other hardware features include an integrated LED flashlight with white and red light options and a 10 ATM water-resistance rating. Garmin has also introduced a new ComfortFit Fabric Band with moisture-wicking properties and QuickFit compatibility, making it easier to adjust the fit or swap bands.

Garmin Enduro 4 price and availability

The Enduro 4’s US suggested retail price is $899.99, and Garmin lists it as available to order.

Compared with the Enduro 3, the new model keeps the same core emphasis on extended battery life and lightweight construction while adding more memory, faster mapping, and new training capabilities. For endurance athletes and outdoor enthusiasts, those refinements make the Enduro 4 a more capable companion for long-distance activities without sacrificing the series’ defining focus on battery longevity.