- American Canoe Association
- American Rivers
- American Whitewater Association
- Austin Kayak and Paddling Meetups
- Dallas Down River Club DDRC
- Gulf Area Sea Paddlers GASP!
- Houston Area Sea Kayakers HASK
- Houston Canoe Club
- Houston Canoe Club (Facebook)
- North Texas River Runners NTRR / NTWWP (Facebook)
- Neches River Runners (Facebook)
- Texas Canoe and Kayak Racing Association
- Texas Water Safari
- The Eyes of the San Marcos (Facebook)
- Trinity Coalition
2025 San Marcos River Rendezvous a Success!
2025 San Marcos Cleanup held on March 1st, 2025 Approximately 200 paddlers from all over Texas participated in the world’s longest river clean up. They picked up trash along the
March 26, 2025