From I-10, take the Houghton Road exit (Exit 275). Proceed south for one mile to the Pima County Fairgrounds sign. Turn right (west) on Brekke Road and go half a mile to the Brekke Road entrance and turn left to enter. See the map above. NEW:It now helps to know where you want to go. To get to Thurber Hall (Working, Sporting, Herding groups), FastCAT, OB/Rally, or to the field, go left before the guard shack and go through the Blue gate. For Old Pueblo Hall (all other groups) and RV Parking or Box Van check-in turn right just past the guard shack. There will be signs to direct you. The Fairgrounds are located 17 miles east of downtown Tucson.