From the Dallas North Tollway (Dallas Parkway):Drive north to McKinney, 3.5 miles past Eldorado Parkway to Highway 380/University Drive. Turn right at the light. Go about 6.2 miles. The Tucker Hill entrance is on the left.From US 75/121:Drive north to McKinney. Exit Highway 380. Turn left onto Highway 380/University Drive. Continue about 4.4 miles to the Tucker Hill entrance on the right.