 The mainstays of Trevi's economy are olive oil and tourism.The "comuni" of Trevi and Spoleto are known for the quality of their oil, a result of near-ideal calcareous soil with excellent drainage, just the right altitude for the cultivation of olive trees, and favourable climatic conditions on the west-facing lower slopes of the Apennine mountain range.Trevi's good train and highway access has made the town the most convenient base for visiting central Umbria for those who rely on public transportation; the unusual number of good restaurants in the "comune" is partly the cause, partly the result of increased tourism.