Mardi Gras! Galveston is the largest Mardi Gras celebration in Texas and the 3rd largest in the United States. The celebration is spread over 12 days and includes galas, parades, music, food and plenty of family-friendly activities. Some of the most anticipated events include the Tremont House Mardi Gras Ball and the San Luis Salute by the Fertitta's. Those looking for a challenge should sign up for the Jolly Jester Jaunt 5K Costumed Run for Fun. Good luck running those miles with a funky costume and full belly!