Fazenda Castelo Airstrip is a small private airstrip located in the Porto Velho region of Rondônia state, Brazil. It carries the ICAO designator SSA0 and serves primarily the agricultural and ranching operations of the fazenda (farm or estate) with which it is associated. The airstrip is not a commercial facility and does not serve scheduled passenger airline services. It is typical of the many private rural airstrips found throughout the Brazilian interior, providing essential air access to remote agricultural properties where road infrastructure may be limited.