The main activity that occurs during the Albuquerque International Balloon Fiesta is the mass ascension of hot air balloons, creating a breathtaking spectacle. This event showcases over a thousand balloons, filling the skies with vibrant colors. Visitors enjoy various activities such as balloon rides, fireworks, and evening glow shows. The fiesta emphasizes community spirit, artistic expression, and a love for aviation, making it a celebrated annual tradition that draws participants worldwide.