State Capitol's 'Mile High' step

A step on the west entrance of the Colorado State Capitol is marked as exactly one mile above sea level (5,280 feet) and has been used as Denver's traditional 'Mile High' reference for decades. The marker is a prominent civic and tourist symbol and appears on city branding and local business names. The precise one-mile claim is based on historical elevation datums and has been described as symbolic because modern geodetic measurements can differ slightly.