Background: Despite their altitude of above 2000 m, malaria is a major public health threat in the Ethiopian highlands. Seasonal migration of laborers to the lowlands where malaria transmission is high is common. In Amhara, ≈400,000 people travel from the highlands to the lowlands each year during planting and harvesting seasons (June-November). Their return coincides with the rainy season (October-January). The impact of imported infections on P. vivax and P. falciparum transmission in the Ethiopian highlands is not known. Material and Methods: Blood samples, demographic data, and travel records were collected from febrile patients from November 2019 to September 2020 at Maraki Health Center, Gondar (elevation of 2,133m). Light microscopy was used for diagnosis. Results: 1940 febrile patients were enrolled. The number of patients screened per day ranged from 15-16 during the peak season in November-January to 3-4 in April-May. In total 337 patients were positive for P. falciparum, P. vivax, or mixed infections (131 P. vivax only, 193 P. falciparum only, 13 mixed). Test positivity rate peaked in December (Pv: 17.5%, Pf: 23%), and was lowest in February (Pv: 1.6%, Pf: 1%). Travel was a risk factor for infection, in particular at times when migrant laborers returned from the lowlands. In November, 15% of all febrile cases and 29% of those infected reported travel in the preceding 4 weeks (P<0.001). <5% of patients traveled in the other months. Overall 25/144 P. vivax patients and 17/206 P. falciparum patients reported recent travel. Conclusion: P. vivax malaria was observed throughout the study period. While travel increased the risk of testing positive, the majority of infections was observed in non-travelers, highlighting the contribution of local transmission. Genotyping to compare imported and local cases is ongoing.