Which altitude is deemed safe for mountain flying in winter?

In mountain flying, especially during winter, safety is paramount due to the challenging terrain and potential weather conditions. The correct altitude deemed safe for mountain flying is one that takes into account the minimum en route altitude (MEA). When flying at or above 1000 feet above the published MEA, pilots can ensure adequate vertical clearance from terrain and obstacles, accounting for possible variations in the reality of flight operations.

The MEA is specifically designed to ensure that aircraft remain clear of terrain and obstacles while also providing uninterrupted radio communication. By maintaining an altitude that is at least 1000 feet above this published MEA, pilots can enhance safety margins, particularly where mountainous terrain may not provide clear visibility or where weather conditions could potentially lead to turbulence or other hazards.

While other altitudes, like being above the highest terrain or over the nearest obstacle, may provide safety in some contexts, they don't specifically account for the minimum en route information critical for navigation and obstruction avoidance, particularly in mountainous areas where terrain can vary dramatically. Thus, the established protocol of flying at 1000 feet over the MEA during winter is often regarded as a safer practice in mountain flying.