- Where is QTR located?
- QTR is in Napa Valley, United States (955 School St, Napa, CA 94559., Visitor Information: 1450 First St, Napa, CA 94559 (Napa Valley Welcome Center)., Visit Napa Valley, +1, The valley spans roughly 30 miles long and is defined by the Vaca Mountains to the east and the Mayacamas Mountains to the west., Visit Napa Valley, +1, Napa coordinates - Latitude, Longitude - Time-Ok).