- 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
The San Marcos River Clean Up and Rendezvous
Saturday March 7, 2026 On Saturday, March 7, 2026, paddlers from all over Texas will be participating in the world’s longest river clean up. We will be picking up trash
January 20, 2026