Fazenda Santa Tereza Airstrip (ICAO: SD9F) is a small private airstrip located in the municipality of Sena Madureira, in the state of Acre, Brazil. It serves the operational needs of a rural fazenda (farm or ranch) in the remote Amazon region, providing essential air access to an area where road connectivity is limited or seasonal. The airstrip is not a public commercial airport and has no IATA code, reflecting its status as a private facility. Like many fazenda airstrips in the Brazilian Amazon, it primarily supports light general aviation aircraft used for agricultural management, supply transport, and personal travel by the property's owners and workers.