- Pima Trails Association Last updated: 03/12/02 And many thanks to dakotacom.net for their support! Welcome to the Pima Trails Association website. Take a look at our Calendar of Events for important upcoming trails advocacy dates! For more on the latest from PTA, see NEWS. PTA Statement of Purpose Pima Trails Association is a non-profit, volunteer trails advocacy organization composed of ...www.pimatrails.org