History of San Marcos River in Timeline

By Popular Timelines Editorial Team · Updated: April 5, 2026

The San Marcos River originates from the San Marcos Springs in San Marcos, Texas, which is home to the Meadows Center for Water and the Environment. This spring-fed river supports several threatened and endangered species like the Texas blind salamander, fountain darter, and Texas wild rice. The river is a well-known destination for various recreational activities, including tubing, canoeing, swimming, and fishing, making it a popular spot for locals and tourists.

1963: The Texas Water Safari event started

Since 1963, the Texas Water Safari event, using canoes powered only by human muscle, has run every year. The event spans from Aquarena Springs in San Marcos to Seadrift, Texas, totaling 260 miles using the San Marcos River and the Guadalupe River. The Texas Water Safari is billed as the "World's Toughest Boat Race" and runs annually on the second Saturday of June.

1983: Last samples collected of San Marcos gambusia

In 1983, it was the last time samples were collected of San Marcos gambusia, and it is even considered to be extinct.

1998: Severe flooding affected the river

In 1998, the San Marcos River was affected by severe flooding.

2006: Establishment of the Edwards Aquifer habitat conservation plan

In 2006, the Edwards Aquifer habitat conservation plan was established as an attempt between several Texas cities that use the many resources of the San Marcos River to manage aquatic habitats and water resources of the Comal and San Marcos springs.