- 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