La Garroba Airport is a small, uncontrolled airstrip located near Upala in the Alajuela province of Costa Rica. It serves the northern lowland region near the Nicaraguan border, primarily supporting light general aviation traffic, charter flights, and agricultural operations in the area. The airport bears the ICAO identifier MRLG and has no assigned IATA code, reflecting its status as a minor regional airfield rather than a commercial passenger facility. Its runway is unpaved and suitable only for small aircraft. The surrounding area is characterized by wetlands, farms, and the Upala canton, which is known for cattle ranching and agricultural activity.