March : Daffodil Days – An annual event to welcome Spring which features the picturesque scene of 2,000 blooming in the Historic District gardens.
April : Central Texas Golf Fest - Largest amateur golf tournament in United States. Participants play on seven courses in a three county area.
June : Texas Water Safari - The world's toughest 260-mile boat race. A favourite for canoeists, kayakers, and spectators.
September : Republic of Texas Chilympiad, Chili Cook-off - A variety of entertainment, food booths, parade, live music, arts & crafts, Miss Chilympiad contest, the North American Open Chili Cook-Off, and much much more.
San Marcos Police work on bicycles around town so as to assist residents and tourists. Its quite a novel idea which makes them appear more friendly and approachable for help. They also enforce traffic regulations.