Tickets are required for the Passadiços do Paiva walkway and the 516 Arouca Bridge. You must purchase them online, in advance, as no tickets are sold at the entrances to the park.
If you are planning on visiting the 516 Arouca Bridge, purchase your ticket through the 516 Arouca Bridge Web site, because that ticket includes admission to both the bridge and the Passadiços do Paiva walkway. Otherwise purchase the walkway-only ticket (no bridge access) through the Passadiços do Paiva site.
Passadiços do Paiva €2/adult €0/child (0-9) €2/youth (10-17) €2/senior (65+) https://ticketline.pt/en/evento/Passadiços-do-paiva-74294
Make sure you purchase the correct ticket for the entrance you are using (Areinho entrance or Espiunca entrance)
516 Arouca Bridge €12/adult €10/child (6-9) €10/student (18-30) €10/youth (10-17) €10/senior (65+) https://ticketline.pt/en/pesquisa?query=516+arouca&district=&venue=&category=&from=&to=
Make sure you purchase the correct ticket for the entrance you are using (Areinho entrance or Alvarenga entrance)