Lillard, the NBA Rookie of the Year last season, had 15 points in the first half. Aldridge, who finished 8 of 9 from the field, scored 10 points in the third quarter for Portland (1-2).
The matchup was the first between Lillard and Utah point guard Trey Burke, the consensus college player of the year last season at Michigan. Burke had seven points on 3-of-10 shooting.
Aldridge scored eight points in the first 3 minutes of the third quarter as Portland turned a nine-point halftime lead into a 63-45 advantage.
It was the first preseason game played in Boise since 2003.