ALTOS -- Arkansas-Louisiana-Texas Orienteering Society.
PTOC -- Possum Trot Orienteering Club, Kansas City, Missouri.
NTOA -- North Texas Orienteering Association, PO Box 832464, Richardson, TX, 75083-2464. Contact: 214-369-1823.
HOC -- Houston Orienteering Club. Contact: Carolyn Ortegon
APF -- Aggie Pathfinders, College Station, TX