What is the most famous American festival?

The most famous American festival is Mardi Gras, celebrated annually in New Orleans, Louisiana. Mardi Gras, also known as Fat Tuesday, marks the final day of the Carnival season before the Christian observance of Lent begins. The festival is famous for its extravagant parades, colorful floats, beads, masks, and street parties. Revelers dress in elaborate costumes and enjoy live music, food, and dancing. Mardi Gras has deep cultural roots in New Orleans and is a major tourist attraction, drawing visitors from around the world to experience its vibrant atmosphere.