10 Best Altimeters 2025 in the United States

The Garmin GPSMAP 65s stands out with its large 2.6-inch color display that's easy to read in sunlight, making navigation straightforward in various lighting conditions. Its expanded GNSS and multi-band technology ensure high accuracy even in difficult terrains like dense forests, steep areas, or urban canyons. This is a significant advantage for users who find themselves in challenging environments where lesser devices might struggle with signal reception.

The integration of a 3-axis compass and barometric altimeter adds to its reliability for precise altitude and direction tracking. While the device supports both barometric and GPS altimetry, the combination of both ensures better accuracy in versatile situations. The device's durability is supported by its rugged design, suitable for outdoor activities like hunting, hiking, and camping. It comes with a carabiner clip for easy portability.

The Garmin GPSMAP 65s requires 2 AA batteries (included), which can be a double-edged sword — while it ensures that you can carry extra batteries for extended trips, it might also mean frequent battery changes depending on usage. The device pairs with the Garmin Explore app, allowing for route planning and data review, which is a valuable feature for serious adventurers. Some users might find the button-operated interface less modern compared to touchscreen alternatives, but it can be more reliable in wet or gloved conditions. The unit is quite lightweight at 7.7 ounces and has relatively compact dimensions, making it convenient to carry. With features like preloaded Topo maps and public land boundaries, it offers a robust tool for navigation.

The Casio Men's PRO Trek PRW-6600Y-1A9CR watch is a versatile tool that combines multiple functions useful for outdoor enthusiasts. As an altimeter, it uses a barometric sensor to measure altitude, offering reasonable accuracy for most outdoor activities. The altimeter can record up to 30 altitude readings, which is handy for tracking changes over time. However, it might not be as precise as GPS-based altimeters for highly detailed altitude measurements. The watch features a Tough Solar battery, ensuring long battery life by harnessing solar power, which is beneficial for extended trips without access to charging facilities. Its 100M water resistance makes it suitable for swimming and snorkeling but not for diving.

Durability is a strong point, with a robust stainless steel case and a resin strap that can withstand rough conditions. The digital compass, barometer, and thermometer add valuable functionality for hikers and adventurers. Ease of use is enhanced by the full auto LED light, making the display easy to read in low-light conditions. The watch also includes user-friendly features like five daily alarms, a stopwatch, countdown timer, and a power-saving function.

Though it might be bulky for some users, given its 51.5mm case diameter and 14.2mm thickness, its comprehensive feature set makes it a reliable companion for outdoor activities. The quartz movement ensures accurate timekeeping, and the analog-digital display provides a classic yet functional look. This watch is best suited for those who need a rugged, multi-functional timepiece for outdoor adventures, though its size and weight might be a consideration for everyday wear.

The Casio Men's Pro Trek PRW-3500T-7CR is a feature-packed altimeter suitable for outdoor enthusiasts. Its solar-powered functionality ensures a reliable power source, reducing the need for frequent battery changes. The accuracy of the altimeter is notable, with a measuring range from -700 to 10,000 meters, making it versatile for various altitudes. The watch employs barometric pressure for altitude measurement, which is generally reliable but can be affected by weather changes. Unlike GPS-based altimeters, it may require frequent calibration for optimal accuracy.

The device also includes a barometer, thermometer, and digital compass, which are valuable for comprehensive outdoor navigation and weather monitoring. The battery life is enhanced by its solar power and power-saving functions, reducing concerns about running out of charge during extended outdoor activities. Durability is a strong point with a 56 mm resin case and mineral dial window, combined with a titanium band and a water resistance of up to 200 meters, making it robust for harsh conditions. However, the watch's bulkiness at nearly 6 ounces might be cumbersome for some users.

The ease of use is supported by a clear digital display with a backlight, but the multitude of features might require a learning curve for those not familiar with advanced sport watches. Additional features such as atomic timekeeping, multiple alarms, and sunrise/sunset data offer convenience and enhance its functionality. While it lacks the pinpoint location accuracy of GPS-based models, the Casio Pro Trek PRW-3500T-7CR remains a solid choice for those seeking a durable and feature-rich altimeter for outdoor activities.